digital rf dmr fm power amplifier uhf 20w radio 400-470mhz dc 10-14v. Usually it cost about 35USD-50USD. RF-IN port, RF-Out port to connect external antenna (antenna not included) Dual-color LED Indicator Green shows standby status Red shows transmitting status Parameters Item Name RF Power Amplifier Input Power 1-5W Modulation Mode DMR, C4FM, DPMR, CW, FSK, P2S, FM Transmitting Frequency 400-470MHz Receiving Frequency 50-1,000MHz Working Mode Half Duplex (Cannot receive and transmit at the same time) Receiver Loss -1DB±0.4 Output Power 20W Power Supply DC 10-14V Standby Current 10-30MA Cooling Way Cooling fan works when the temperature is more than 40â?