the repeater can work both ways (v2u & u2v) and has 0.8W - 1W of output power DTMF: there is place on the PCB for DTMF module (2 common versions) and it is connected to the arduino. the arduino sketch ...

RETEVIS Portable Repeater series covers Low Power Version “UHF/VHF Analog, GMRS ,UHF/VHF Digital” , Raspberry Pi Version and High Power Version. Game-Changing Features of the RETEVIS RT97L ...