Two way radios with the adjustable gain feature allow you to adjust the sensitivity of your microphone. This is useful along with hands-free operation because it helps minimize the possibility of unintended noises triggering a transmission, or enhances the ability to pick up quiet voices.

 Audible Button Beeps

Radios with this feature play a tone whenever a button is pressed. This helps you to confirm that the button was actually pressed.

 Audio Accessory Connector

Radios with the audio accessory connector feature have a port that will allow you to connect external devices to your two way radio. The actual devices supported vary by model. Some of the most popular external accessories are microphones, speakers, and hands-free kits.

 Backlit Display

Most two way radios have a digital LCD display that displays useful information, such as your current channel. Radios with this feature allow you to turn on a lighted display, to make information easier to read in darker environments.

 Battery Charger

A battery charger will re-charge two way radios that include rechargable batteries. If you plan to use your two way radio with any frequency, rechargable batteries are a good idea and will pay for themselves in the long run!

 Battery Meter

A battery meter will indicate the amount of charge remaining on the battery.

 Battery Saver

Two way radios with this feature generally have a "low power" mode that they will switch to automatically after being left unused for a certain amount of time. While in the "low power" mode, the drain on the battery is less than during normal operations.

 Battery Type

Two way radios are mobile devices and were intended to move around with you. Because of this all radios operate on battery power. Most models will work with standard alkaline AA or AAA batteries. Several models include rechargable batteries. Rechargable batteries included with two way radios are usually either Nickel Cadmium (NiCd) or Nickel Metal Hydride (NiMH). NiMH rechargable batteries are usually considered superior to NiCd. NiMH batteries usually last longer and have no "memory effect". NiCd batteries do suffer from the "memory effect" and because of this it is recommended that you completely drain your NiCd batteries before you recharge them.

 Call Tones

Call tones allow you to transmit a tone to other radios in your group to alert them that you want to talk. This is similar to a telephone's ringing to indicate that someone wants to talk to you. Many radios allow you to choose from several different call tones.

 Channel Scan

The channel scan feature enables a two way radio to continuously scan each channel for activity. When activity is detected on a channel the scan process will stop and you will hear the transmission.

 Channels

A channel is a frequency on which two way radio users can communicate. There are 14 FRS channels and 15 GMRS channels, and of those 7 are shared. Radios supporting both FRS and GMRS will support 22 channels. To communicate with others using a two way radio, all radios in the group must be set to the same channel.

 Clock

Two way radios with a clock will display the current time. Some radios with this feature also have an alarm feature.

 Companding

A sophisticated digital voice compression technology that reduces the static hiss between words. This technology extends the effective range of the radio and delivers noticeably clearer transmission quality.

 Digital Compass

A digital compass will tell you which direction you are headed. Two way radios with this feature will usually show you abbreviations for your direction while the compass is active. Common abbreviations are: N, E, S, W, NE, NW, SE, SW.

 Drop-In Charge Capable

Two way radios that are drop-in charge capable are compatible with desktop type cradle chargers. In these chargers, you drop the entire radio in a cradle while it recharges.

 Dual Channel Watch

Dual channel watch allows you to monitor two channel/privacy code combinations at once.

 Eavesdrop Reducer

The eavesdrop reducer feature will allow you to set a special "eavesdrop reducer" code. Setting this code will cause your radio to garble the tranmission for anyone else who may be listening. Another radio with this feature must be set to the same "eavesdrop reducer" code before they will be able to hear your transmission correctly. This feature does not guarantee secrecy, but it does add an extra layer of privacy.

 Fixed Antenna

Fixed antennas are not able to be removed from the radio.

 FRS Channels

FRS channels are channels that were set aside by the FCC for use by the Family Radio Service (FRS). There are 14 FRS channels available. The FCC has limited the amount of power that a device can use to broadcase on an FRS channel to .5 watts, which is a maximum of around 2 miles.

 GMRS Channels

GMRS channels are channels set aside by the FCC for use by the General Mobile Radio Service (GMRS). There are 15 GMRS channels available. The range limit put in place by the FCC for FRS frequencies does not exist for GMRS frequencies. Because of this most radios that support the GMRS frequencies have a greater maximum range than FRS radios. The FCC requires that all operators using the GMRS frequencies obtain a radio license before operating their equipment. To obtain this license request form 605, which includes all forms and instructions.

 Interchangeable Face Plates

Two way radios supporting interchageable face plates have snap-off front covers. These "face plates" can be replaced with others to give your radio a fresh look and style!

 Keypad Lock

Radios with the keypad lock feature allow you to "Lock" the buttons so that pressing them has no effect. This is useful if you are carrying the radio in your pocket or in a purse where buttons could accidentally get pressed.

 Low Battery Alert

Two way radios with the low battery alert feature will alert you in some way when the battery charge is getting low. Some models will provide an audible tone to indicate the battery is low. Other models show a special icon in the display when the battery charge is getting low.

 Manufacturer Warranty

This is the warranty provided by the manufacturer. See manual for specific details.

 Memory Locations

Two way radios with memory locations allow you to store your frequently used channel/privacy code combinations for easy access later.

 Monitor Channel

This feature allows you to check if a channel is clear before you transmit.

 Noise Filtering

The noise filtering feature reduces unwanted noise. Many models accomplish this by shutting off weak transmissions, thus eliminating unwanted noise due to terrain and conditions. For some other manufacturers, turning this feature on means that the radio only receives transmissions from other radios by the same manufacturer with this feature enabled.

 Plug-In Charge Capable

Two way radios that are plug-in charge capable have a port where you can plug in a charger. This is similar to how most wireless phones are charged.

 Power Selectable

The power selectable feature allows you to switch between high and low power modes for GMRS frequencies. Low power mode would reduce the range of your two way radio. If your group is using a GMRS frequency, it could be useful to have to option to reduce your range if you are receiving unwanted transmissions from outside of your group.

 Privacy Codes

Many radios divide individual channels up into a certain number of privacy codes. Instead of only needing to be on the same channel to communicate with other members of your group, radios using privacy codes require all radios to have the same channel/privacy code combination in order to be able to communicate. This is an extremely useful feature. In places where many people are using two way radios, such as sporting events or theme parks, it would be very difficult to find a channel that wasn't always being used or monitored if only 22 channels were available. Privacy codes make it possible for your to take your two way radio to high traffic places and still be able to communicate with your group in relative privacy.

 Range

It is important to be aware that the number of miles of range advertised by two way radio manufactures is always the maximum range that the radio will get under perfect circumstances. Many things can affect the range, such as trees, bushes, buildings, vehicles, or almost anything that could interfere with line of sight.

 Range Extender

This is the opposite of the Noise Filter feature. When the range extender feature is turned on, your radio will receive even very weak transmissions. This may result in unwanted noise, but will extend the range of your two way radio.

 Rechargeable Battery Included

Some two way radios include rechargeable batteries. If you plan to use your radio frequently, upgrading to a model that includes rechargeable batteries will pay for itself in no time!

 Scan Channel Delete

Radios with this feature allow you to remove a specific channel from a scan. This can be very useful if you need to perform a scan, but there are channels with activity that you know you are not interested in.

 Shared Channels

There are seven channels assigned by the FCC to the Family Radio Service (FRS) and General Mobile Radio Service (GMRS) that overlap. Channels 1 through 7 have been assigned to both services. Almost all radios that support the GMRS channels also support the FRS channels. You will sometime see a difference between how some radios supporting both services handle these frequencies. Some treat them as low range FRS channels and others as high range GMRS channels. Some others give you the option of setting the range yourself for these shared channels.

Signal Strength Indicator 

A signal strength indicator will give you an indication of how strong the signal of your incoming and outgoing transmissions are.

 Silent Mode

In silent mode, the radio will indicate an incoming transmission without making an audible alert of any kind. Typically, the display will flash several times to indicate the incoming transmission. This is a great feature for hunters, where a noise may be disruptive.

 Stopwatch

Some two way radios have a stopwatch feature. A stopwatch displays the amount of time between when it was started and when it was stopped.

 Talk Confirmation Tone

The Talk Confirmation Tone is sometimes called a "Roger Beep". When this feature is activated, a tone is transmitted to the listener after a transmission. This alerts the listener that you are finished, and that it is their turn to talk.

 Timeout Timer

The timeout timer feature is intended to prevent accidental transmissions and to save battery life. If the "TALK" button is held for a long period of time, the radio will automatically stop transmitting.

 Transmit Power

The transmit power of a two way radio is measured in watts and is the major factor in determining the range of a radio. Generally the more watts of transmit power, the greater the range of the radio. The FCC limits the transmit power of radios on the FRS channels to .5 watts.

 Vibrate Alert

Two way radios with the vibrate alert feature have the ability to vibrate to alert you that you are receiving a message. This is very useful in noisy environments where it would be difficult to hear a call tone or a message.

 Voice Scramble

The voice scrambling feature garble your transmissions, allowing you to have conversations that are more private and secure. In order to use the voice scramble feature, all members of your group must have radios supporting this feature. This feature does not guarantee secrecy, as someone with a similar radio could hear your conversations, but it does add an extra layer of privacy.

 VOX

Radios supporting the Voice Activated Transmit (VOX) feature allow you to use your two way radio "hands-free". The radio will automatically begin transmitting when you speak.

 Water Resistant

Water resistant two way radios are better suited for use in environments where they may get wet.

 Weather Channels

Radios supporting this feature can tune into broadcasts by the NOAA Weather Radio and Environment Canada Weather Radio. Most radios that will allow you to listen to weather channels also have the ability to alert you automatically to emergency weather broadcasts. This feature requires that NOAA or Environment Canada service be available in your area. Check with your local weather office to verify that this service is available.

VERO GLOBAL COMMUNICATION CO.,LTD

　　We treasure every opportunity to meet with you, our valued customer.

　　From 13 Oct. - 16 Oct 2009, we will be exhibiting at the "HK Electronics Fair (Autumn Edition)" in HKTDC ,in this fair,we will exhibition our new products Dual-Band Duplex Talking Two Way Radio And Dual-Band Mobile Radio.The Radio has IPX7 equivalent waterproof.  

　　We cordially invite you and your colleague  to visit our booth.

　　Our booth number is N1AD07 in Meeting Room N101-N112 .

　　You may click here to find our location.

　　With Compliments

A marine VHF set is a combined transmitter and receiver and only operates on standard, international frequencies known as channels. Channel 16 (156.8 MHz) is the international calling and distress channel. Channel 9 can also be used in some places as a secondary call and distress channel. Transmission power ranges between 1 and 25 watts, giving a maximum range of up to about 60 nautical miles (111 km) between aerials mounted on tall ships and hills, and 5 nautical miles (9 km) between aerials mounted on small boats at sea-level. ^[2] Frequency modulation is used.

Modern day marine VHF radios have a variety of features in addition to basic transmit and receive capabilities. All fixed mount marine VHF radios produced nowadays have some level of DSC calling capability. A number of the more expensive units are capable of acting as a hailer when connected to a hailer horn, can work with optional voice scramblers, and a few even have the ability to use a Bluetooth headset. A large number of unbiased independent reports on both fixed mount and handheld marine VHF radios can be seen at Marine Electronics Reviews

Marine VHF mostly uses "simplex" transmission, where communication can only take place in one direction at a time. A transmit button on the set or microphone determines whether it is operating as a transmitter or a receiver. The majority of channels, however, are set aside for "duplex" transmissions channels where communication can take place in both directions simultaneously ^[3]. Each duplex channel has two frequency assignments. This is mainly because, in the days before mobile phones and satcomms became widespread, the duplex channels could be used to place calls on the public telephone system for a fee via a marine operator. This facility is still available in some areas, though its use has largely died out. In US waters, Marine VHF radios can also receive weather radio broadcasts, where they are available, on receive-only channels wx1, wx2, etc.

Operating procedure

The accepted conventions for use of marine radio are collectively termed "proper operating procedure." These conventions include:

• Listening for 2 minutes before transmitting
• Using Channel 16 only to establish communication (if necessary) and then switch to a different channel
• using a set of international "calling" procedures such as the "Mayday" distress call, the "Pan-pan" urgency call and "Securité" navigational hazard call.
• using "pro-words" based on the English language such as Acknowledge, All after, All before, All stations, Confirm, Correct, Correction, In figures, In letters, Over, Out, Radio check, Read back, Received, Repeat, Say again, Spell, Standby, Station calling, This is, Wait, Word after, Word before, Wrong
• using the NATO phonetic alphabet: Alpha, Bravo, Charlie, Delta, Echo, Foxtrot, Golf, Hotel, India, Juliet, Kilo, Lima, Mike, November, Oscar, Papa, Quebec, Romeo, Sierra, Tango, Uniform, Victor, Whiskey, X-ray, Yankee, Zulu
• using a phonetic numbering system based on the English language: Wun, Too, Tree, Fow-er, Fife, Six, Sev-en, Ait, Nin-er, Zero, Decimal

Marine VHF radio is sometimes illegally operated inland. Since enforcement is often the job of the local coast guard, enforcement away from the water is sometimes difficult.

Marine VHF Channels and Frequencies

Channel number	"A" frequency (MHz) Usually ship stations	"B" frequency (MHz) Usually coast stations	United Kingdom	United States	Canada	Australia
0	156.000	160.600	Private, coast guard Ⓐ
1	156.050	160.650			Public Correspondence (Ship-to-Shore Duplex) BC Coast
2	156.100	160.700			Public BC Coast
3	156.150	160.750		Ⓐ Illegal for public use1	Public BC Coast/Inland
4	156.200	160.800			Ship-to-ship/shore, commercial and safety BC and East Coasts Ⓐ
5	156.250	160.850
6	156.300	160.900	Ship-to-ship Ⓐ
7	156.350	160.950
8	156.400	161.000	Ship-to-ship Ⓐ
9	156.450	161.050	Ship-to-ship Ⓐ	Calling Ⓐ, commercial and non-commercial.
10	156.500	161.100	Ship-to-ship Ⓐ
11	156.550	161.150
12	156.600	161.200
13	156.650	161.250	Ship-to-ship Ⓐ	Bridge-to-Bridge safety Ⓐ: Vessels > 20m must maintain watch, Tx limited to 1 watt.
14	156.700	161.300
15	156.750	161.350	Ship-to-ship Ⓐ
16	156.800	161.400	International distress, safety and calling Ⓐ USA: All vessels equipped with VHF must maintain watch.
17	156.850	161.450	Ship-to-ship Ⓐ
18	156.900	161.500
19	156.950	161.550			Canadian Coast Guard - Search and Rescue
20	157.000	161.600
21	157.050	161.650		Ⓐ U.S. Coast Guard Only	Continuous Marine Broadcasts Ⓑ
22	157.100	161.700		Ⓐ U.S. Coast Guard—public working channel2
23	157.150	161.750		Ⓐ U.S. Coast Guard Only
24	157.200	161.800
25	157.250	161.850
26	157.300	161.900
27	157.350	161.950
28	157.400	162.000
60	156.025	160.625
61	156.075	160.675		Ⓐ Illegal for public use1
62	156.125	160.725
63	156.175	160.775
64	156.225	160.825		Ⓐ Illegal for public use1
65	156.275	160.875
66	156.325	160.925
67	156.375	160.975
68	156.425	161.275		Non-commercial Ⓐ
69	156.475	161.075		Non-commercial Ⓐ		Australian Navy
70	156.525	161.125	Digital Selective Calling Ⓐ
71	156.575	161.175		Non-commercial Ⓐ
72	156.625	161.225	Ship-to-ship Ⓐ	Non-commercial ship-to-ship Ⓐ
73	156.675	161.275
74	156.725	161.325	British Waterways Channel (Canal System)
75	156.775	161.375
76	156.825	161.425
77	156.875	161.475	Ship-to-ship Ⓐ
78	156.925	161.525		Non-commercial Ⓐ
79	156.975	161.575
80	157.025	161.625
81	157.075	161.675		Ⓐ U.S. Government Use Only
82	157.125	161.725		Ⓐ U.S. Government Use Only	Canadian Coast Guard - Search and Rescue
83	157.175	161.775		Ⓐ U.S. Coast Guard Use Only
84	157.225	161.825
85	157.275	161.875			Radio Telephone - Duplex
86	157.325	161.925
87	157.375	161.975	Automatic Identification System Ⓑ
88	157.425	162.025	Automatic Identification System Ⓑ

Notes:

1: Some radios enable channels 3a, 61a, and 64a when configured for "USA mode" even though those channels are not listed for maritime use by the US Coast Guard or by the FCC. The frequencies in question appear to be used for land-mobile communication by police and fire departments in some US Cities.

2: Channel 22a is reserved for communication between the U.S. Coast Guard vessels and private vessels. The Coast Guard does not monitor 22a: Contact must first be established on 16.

VERO business radio is also loaded with features.VR-719 offers Wide (25kHz) and Narrow(12.5kHz) channel spacing. Hands-free (VOX)operation is supported when used with optional accessories. Sound Alarm , Bell ring when receiving signal,Adjust power High 5.0 Watt or Low 0.5 Watt ,and supports channel scan and key locking. A 1 year warranty is standard.

Includes one VERO VR-719 two way radio, drop-in fast charger, and 18 hour lithium rechargeable battery.

VR-719 radio is fully programmable, making it the ultimate choice in terms of VHF or UHF compatibility. This VHF model can be programmed to any frequencies in the 136 - 174 Mhz range.This UHF model can be programmed to any frequencies in the 400-470 Mhz range. This model supports 104 DQT (digital) and 50 QT (analog) codes.

Up to 7 mile range (in the open area)

VHF Frequencies 136-174MHz or UHF Frequencies 400-470MHz (it a single band radio ,not dual band radio)

VHF 5.0 Watt Output Power or UHF 4.0 Watt Output Power

16 memory channels

104 Quiet Talk Codes (50 Digital)

Wide (25kHz) and Narrow(12.5kHz) channel spacing

programmable in separate channels

Hands-Free (VOX) Mode (with optional accessories)

Sound Alarm

Programmable by PC software

Bell ring when receiving signal

Priority Scan Function

Adjust power High/Low

Adjust squelch level (0-9)

Self-program

Voice Annunciation

Rechargeable Lithium Battery Pack Included (1200mAh)

Time-out Timer

Channel Scan

Scan Channel Delete

Low Battery Alert

Battery Saver

Audio Accessory Connector

VERO business radio is also loaded with features.VR-718 offers Wide (25kHz) and Narrow(12.5kHz) channel spacing. Hands-free (VOX)operation is supported when used with optional accessories. Three different scan type: TO/CO/SE ,Three color LCD backlight display , Adjust power High 5.0 Watt or Low 1 Watt ,and supports channel scan and key locking. A 1 year warranty is standard.

Includes one VERO VR-718 two way radio, drop-in fast charger, and 22 hour lithium rechargeable battery.

Need headsets or extra chargers? A full line of accessories are available for our radios, including: rapid chargers, high capacity batteries, shoulder mics, and option boards.

The VR-718 VHF radio operates on VHF frequencies. It can be programmed for frequencies in the range of 134 Mhz to 174 Mhz. Two way radios operating on VHF frequencies perform best outside, or in and around wood structures.

5W output power

128 memory channels

Built-in 50 CTCSS and 104 DCS

Wide (25kHz) and Narrow(12.5kHz) channel spacing

programmable in separate channels

Come with 1200mAh Li-ion battery

Input Frequency directly by keypad

VOX built-in

Frequency Scan & CTCSS Scan

Three different scan type: TO/CO/SE

Three color LCD backlight display

Sound Alarm

Programmable by PC software

Bell ring when receiving signal

Priority Scan Function

Adjust power High/Low

Switching between Channel/VFO

Display Channel+ Frequency mode.

Adjust squelch level (0-9)

Busy channel lockout

Keypad lock

Reverse Frequency Function

Channel step 5k,10k,6.25k,12.5k,25k

Program alphanumeric channels name

Self-program

http://verotelecom.en.alibaba.com/