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Instructions how to upgrade RT85 firmware.  ...

Although Retevis RB22 is a semi-keyboard DMR radio, it also supports programs manually.  ...

How to judge whether an antenna is compatible with your radio? Generally speaking, how to judge whether an antenna can make your walkie-talkie achieve better reception?   ...

Retevis RB22 is a UHF frequency band DMR radio. It comes with semi-keyboard which brings you a new experience, and comes with a 1.77inch color screen which also provide you a wonderful visual experience.  Although it dont has the number key, but it also can do pront panel program.   ...

All models of Retevis and Ailunce have overcharge protection function.  ...

Retevis walkie-talkies basically have 1750 functions, and some walkie-talkies cover four types of single-tone pulse signaling, such as Retevis RT23, Ailunce HD1.  ...

What is the difference between digital hotspot and MMDVM digital hotspot repeater?   ...

Now no matter analog radio or digital radio dual band radio, they both have dual standby, but dual receive radio is not unusual; But do you know what is the difference between dual standby and dual receive?  ...

Retevis RT73 mobile radio and Retevis RB22 Semi-keyboard UHF DMR Radio are both have the roaming function.  ...

In the radio communications industry, we talk about radios being on a specific cycle. It’s called the 5-5-90% cycle time assumption. This basically means that when you use a radio, 5% of your time is spent transmitting, 5% receiving and 90% on standby.  ...