The Xiegu XPA125B (new version) is a 100-125 watt solid-state linear power amplifier for frequencies from 0.5 to 30Mhz and 50 to 54Mhz, with an integrated antenna tuner (1.8 to 30Mhz) and a big and bright display for monitoring the amplifier status. It is equipped with protections: temperature, overcurrent, detection of input and output. It's perfect for your QRP radio or low power SDR transceiver. The XPA125B HF amplifier can be used with any QRP HF transceiver and is compatible with the Xiegu G90, X108G, X5105, X6100 and X6200 and it's with automatic bandwidth and output power control function (ALC) For operation with the Xiegu G90, either the CE-19 or the DE-19 is required. The L4001 connection cable is required for operation with the Xiegu X6100 or X6200. The large backlit 2.7 inch LCD display screen shows input/output power, SWR, Voltage, Current, Temperature, amplifier status as well as warning messages making the operation of this modern amplifier simple and also user friendly. The serial connection allows you to hook it up the computer to update the firmware. Specifications: Operating frequency: 0.5~54MHz Input power: ≤5W Maximum output RF power: 1.8-30MHz ≥110W | 50-54MHz ≥ 90W Maximum Ambient Operation Temp: 131 Fahrenheit(55 Celsius) Gain: 13 dB (+/-2dB) Spurious Suppression: >50 dB Supply Voltage: 12-15 Volts DC Transmit Current Draw: @ max output 30 Amps Current parameters: Standby 260mA @Max Launch: 30A@Max Receive Current Draw: @ max 700 mA ATU Frequency Range: 1.8-30 MHz & 50-54 MHz ATU Tuning Range: 14-500 Ω Working voltage: 12V~14.5V DC Machine size: 260*150*100mm | 10.24*6.3*2.56in [Excluding knobs, handles, etc.] Weight:1.6kg | 3.53lb Compatible withXiegu G90, Xiegu X108G, Xiegu X5105, Xiegu X6100, Xiegu X6200Yaesu FT-817, Yaesu FT-818 Recommended Radio & Accessories Xiegu CE-19 Expansion Port for connection with a Xiegu G90 or X5105 Transceiver Xiegu G90 radio Xiegu X5105 HF transceiver Xiegu G1M radio Xiegu X6100 & Xiegu L4001 Cable Xiegu X6200& Xiegu L4001 Cable Xiegu DH100 100W Portable Power Station [eBook] Radioddity Extended Manual for Xiegu XPA125B What's in the box? 1 x Xiegu XPA125B 100W Linear Power Amplifier 1 x Control Cable for CE-19 or older Xiegu Transceivers 1 x DC Power Cable 1 x USB Cable for PC Connection 1 x User Manual