How to set TOT function of H777S?

H777S is a license-free and stylish radio. it has FRS certification,so it is popular with America. H777S have TOT function,some customer will ask what mean is”TOT”? What role does it have? How can i set this function? Today we will learn what is TOT?And how to set it? What is “TOT”? TOT means “time out timer”. When…

Retevis RT84 Firmware Upgrade

Retevis RT84 is a solid built, dual-band DMR/Analog handheld transceiver that would be a good entry-level radio. It has a hefty feel and slightly larger size,low cost under $95USD.  Today let’s learn how to do RT84 firmware upgrade. Enter DFU mode Press the top sidekey and PTT together, turn on the radio.  The indicator will flash red…