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. Item Name: RF Power Amplifier.
Modulation Mode: DMR, C4FM, DPMR, CW, FSK, P2S, FM. Working Mode: Half Duplex (Cannot receive and transmit at the same time). Cooling Way: Cooling fan works when the temperature is more than 40â.Size: 130 x 104 x 60mm (LWH). 1 x RF Power Amplifier.