Check the listing for details. RF Power Amplifier Board Transceiver Circuit PCB for Walkie-talkie Kit. Condition: New. Listed at 24.64 USD. RF Power Amplifier Board Transceiver Circuit PCB for Walkie-talkie KitDescriptionDescription: Note: no radiator 1:LED indicator light(green);transmissing LED indicator light(red)2:1-5W power input(external screw inner hole SMA)3:DC-12-13.8V power supply interface4:Module the second pin (VGG) voltage & power adjusting,clockwise knobing,the voltage increases;Anti-clockwise knobing,the voltage decreases.5:Power output interface(the upper negative,lower positive) Specification:- The max affordable power:70W- Input power:1-5W- Transmitting frequency:depends on the module mode- Output power:depends on the install module mode- Power supply:DC 10-13.8V- Standby current:10-20mA- Output power:10-80W(vary with module)- Working frequency:130-170,400-470(vary with module)- Insertion loss:-1.5DB- Standing Wave Ratio: