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Like many amateur mobile radios, Retevis RT3S can also set the power on/off password and read/write frequency password, but what if you forget it?  ...

Is your repeater easily charged? Common repeater charger ways are including two categories, one is the DC charger and the other is the AC charger. Some people prefer DC power, others prefer AC power supply, which is determined by personal practical needs. What are the advantages and disadvantages of DC and AC charger?  ...

The scrambler function of the analog walkie-talkie is to change or mix the communication voice and informations.  ...

MGRS, UTM, and USGS are often talked together. Do you know what any connection between them？  ...

Compared with business radios, amateur radios have more and more complex functions, so the operation and setting process often leads to abnormal use intentionally or unintentionally. Therefore, almost all amateur radios allow to reset to factory.  ...

How does the GPS of Ailunce HD1 work with Retevis RT3S?  ...

Why set bandwidth for Ailunce HD1？  ...

When we set up a handheld UV radio, we can hear the information of the same channel no matter whether the bandwidth is set to wideband or narrowband, but when we use an SDR radio, if we set different bandwidths, we can often hear different sounds. So, how do we set the bandwidth of the SDR radio correctly?  ...

Amateur frequency resources are provided by the country to all hams, so repeaters working in the amateur band, even if you set up and maintain them yourself, need to provide services for all hams in the coverage area, let's learn together today What problems should be paid attention to when setting up an amateur repeater. ​  ...

Retevis RT97P is a Mini and Portable size DMR repeater. Do you know how to set and use the repeater?  ...