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Cobra Walkie Talkie AM645 8km Twin Two-Way PMR Radios

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Quoting product code: A21XH


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About this product


  • Twin pack of Cobra AM645 two-way PMR radios
  • Keep in touch with your colleagues or friends up to 8km away
  • Eight channel PMR 446 handset, communicating with all other PMR 446 radios

Product overview

• Twin pack of Cobra AM645 two-way PMR radios
• Keep in touch with your colleagues or friends up to 8km away
• Eight channel PMR 446 handset, communicating with all other PMR 446 radios
• Confirmation roger beep indicating to others it's clear to talk Micro-USB charging capability recharges the batteries inside the radio
• Up to 1.5 hours of continuous range on one full charge
• No licence required

Where can I use my PMR radio?
Keep in touch in the garden or at a campsite with these Cobra AM645 two-way radios. These PMR 446 radios use the 446MHz frequency band for communication between the two units, so they're also capable of communicating with all other PMR 446 radios in range. These radios are powerful units with no need for call plans or licences with these walkie-talkies, making them the ideal alternative to mobile phones for wireless communication. You can secure these compact PMRs with the belt clip situated on the back of each radio. To cut down the ambient noise or conduct more cover conversations, the AM645 units can be attached to a compatible headset.

Will these radios be effective in closed conditions?
These two-way radios reach their maximum 8km range in open conditions*. However, they are also effective even if there are obstacles, such as doors and walls, between the transmission ranges. Roger beeps can be used to give confirmation to the person on the other end that it's clear to talk. The Cobra AM645 can be connected with a range of headsets and earpieces for more covert communications or to cut down on background noise.

*Please note: Electrical interference from external sources may impact maximum range at which handsets can communicate.

How many frequencies do these two-way radios have?
You'll never struggle for a clear frequency as each unit has eight channels which have 121 privacy codes for a total of 968 privacy combinations. Comes with voice activated transmission (VOX) for hands free transmission. Using key lock, you won't need to worry about accidentally changing your channel and missing a message.

How do I charge my radios?
Recharge your Cobra PMR radios with the included Micro-USB cable. The radios come with a Y cable so both units can be charged from one socket at the same time. If you are at a festival with no access to mains power, just replace the re-chargeable batteries with alkaline AAA batteries (not included). The power saver circuitry feature extends battery life when you are not transmitting or receiving. The battery level indication on the PMR's display screen will show you when you need to recharge or change the batteries, so you will never get caught without power. The AM645 can last up to three hours of continuous talk-time on a full charge and up to 24 hours on standby.

Rated 4 out of 5 by from Cracking Radios Bought these to pair up with 2 older Cobra PMR's (family of 4). Useable at 2km on the coast (woods and mobile homes between us) with only occasional interference. Transmit at 500 mW (UK limit). Easily charged, good battery life. Impressed for the money.
Date published: 2017-05-13
Rated 3 out of 5 by from Value for money Bought these 2 months ago at Maplin. Usable in town up to a distance of 2 Kms. Have not tested in open field yet. Volume could be higher. Love the fact that I can charge them with my mobile phone car charger.
Date published: 2017-07-07
Rated 1 out of 5 by from Unfortunately not good unusable at approx 1000 metres due to amount of crackle, had to give up and use mobile phone
Date published: 2017-03-17
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Dimensions & Weight









Power Specifications

Power Supply:


Batteries Required:

3x AA per unit (Rechargeable battery packs included)



Standby Time:


Auto Power Off:



Package Contents:

2x Cobra AM645 PM Radios
2x Rechargeable Battery Packs
1x Micro-USB Y Cable
2x Belt Clip
1x User Manual



PMR Radio

License Required:


License Form Included:



Water Resistant:


Impact Resistant:


IP Rating:


Operating Specifications



Privacy Codes:






Frequency Range:

446006.25- 446093.75 kHz

Channel Step:


Maximum Operating Distance:





Warranty Type:


Product Specifications

Scan & Trap Function:


VOX Function:


Roger Bleep:


Pack Size:


Out Of Range Alert:


Headset/Microphone Socket:


Adjustable Squelch:

Auto Squelch

What is the difference between the AM 645 and MT 645 radios. I intend to use them for motorbike to motorbike comms with the Cobra headset , second question is the PTT function usable as a handlebar mounted functionality. Thanks Jeff

Asked by: Jeff
This service is for frequently asked questions and does not allow two way communication, In order for us to best assist you with your technical issue please contact us on the details below: 0333 400 9500 or email
Answered by: Billy
Date published: 2017-08-30

Will it work if it's behind alot of walls ? Does that matter ? And can it be connected to other walkie-talkies? If yes please tell me where I can buy 10 of them from 

Asked by: JOseph
Yes it will work through walls, it will also talk to any number of other PMR446 handsets You could place an online order with us we have plenty of stock to satisfy a 10 unit order.
Answered by: Les
Date published: 2017-05-08
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