50W Portable Shortwave Power Amplifier With 4-Gear LPF Automatic Transmit And Receive Switching Compatible With Multiple Protocols

【Automatic Transmit&Receive Switching】: Features automatic transmit/receive switching for more convenient during communication to ensure transitions without manual intervention 【Flexible Band Selection】: Supports 4-band manual or external control band switching, compatible with multiple band switching protocols, providing versatility for different applications 【Temperature Protecting and Intelligent Cooling】: Incorporates temperature protecting function and an intelligent cooling system to maintain the most appropriate operating temperatures, ensuring performance even during prolonged use 【Rugged Housing Structure Design】: It is designed with an optimized housing structure to resist accidental drops and provide higher durability, ensuring -lasting reliability in various conditions