Digital RF Power Amplifier UHF 80W Radio DMR Amplifier FM Power Amp. Features: - Elegant Appearance: Black oxidized all-aluminum casing - Cooling fan works when the temperature is more than 40â?? - 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: 80W - Power Supply: DC 10-14V - Standby Current: 10-30MA - Cooling Way: Cooling fan works when the temperature is more than 40â??- Size: 130 x 104 x 60mm (LWH) - Weight: 880g Package Included: - 1 x RF Power Amplifier How to Use it. Usually it costs about 30USD-50USD. If you receive the item that not satisfied or defective, please do not open case and kindly notify us within 30 days.