Koolenry 12215V 100W Portable Short Wave Power Amplifier 2MHz to 30MHz Shortwave Power Amplifier with 4 Gear LPF Support for

4. Compatibility with for and for Band Switching Protocols: Portable power amplifier features seamlessly switch between for and for bands with a frequency range of 2MHz-30MHz. 1. Versatile Band Switching: This portable shortwave power amplifier supports 4 manual or external control line band switching options for easy frequency adjustments. 2. Automatic TX RX Switching: Built in circuitry enables seamless transmission and reception switching without the need for a dedicated PTT line. 3. Temperature Safety and Intelligent Cooling: Aluminum alloy casing with powerful fan ensures efficient heat dissipation and automatic cooling at set temperature thresholds for the power amplifier. 5. High Transmission Power Range: Transmit up to 6W of power, making it ideal for a wide range of portable shortwave amplification needs.