License-Free Walkie-talkies and Functional Comparison

License-Free walkie-talkies  is a hand-held, portable, two-way radio What are the license-free walkie-talkies One type of walkie-talkie is called a license-free radio, that is,you don’t have to hold a certificate to use them. Difference between License-Free walkie-talkies Retevis RT20 RT22 and RT15  are all very compact but performs well. Retevis RT22 walkie talkies are durable…

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What is the PoC Handset Radio?

PoC is an abbreviation of Push-to-Talk Over Cellular.
It means that you can communicate with your partner in one system by 4G/LTE network.
It is a technique of using the mobile phone network , to make calls that conduct like conventional walkie talkie,  with instant access and one to many calls,
one to one call, many to many call, use of the advantage on the world-wide coverage of the cellular phone networks, GSM, 3G, 4G etc.

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