Feature:1. INTELLIGENT COOLING: Short radio power amplifier shell is made of aluminum alloy material, built in powerful fan, temperature reach the set value automatically open cooling, with temperature protection function2. FLEXIBLE SWITCHING: Support 4 speed manual or external control line band switching; Automatic transceiver switching, built in TX or RX automatic switching circuit, no special line, there is a signal input automatically switched to the transmission mode3. FREQUENCY AND POWER: Shortwave power amplifier support the frequency range of 2MHz to 30MHz, the transmission traction power is 1 to 5W, and support for ICOM and for XIEGU band switching protocols4. LOW INPUT STANDING WAVE: With an input standing wave of ≤2.0 at 50Ω, this power amplifier ensure minimal reflection for efficient signal transmission, resulting in clear and reliable communication5. STURDY CONSTRUCTION: This power amplifier is durable and lightweight, perfect for portable use. Compact design make it easy to carry and set up anywhere you goSpecification:Item Type: Shortwave Power AmplifierMaterial: Aluminum alloyFrequency Range: 2MHz-30MHzInput Power: 1-5WInput Standing Wave: ≤2.0 at 50ΩOutput Power: 40-55W at 13.8VOutput Impedance: 50ΩCurrent Consumption: ≤12AOperating Temperature: ≤65℃Size(LxWxH): Approx. 164 x 89 x 39mm / 6.46 x 3.5 x 1.54in.Package List:1 x Shortwave Power Amplifier2 x Connection Cables