Specification Operating frequency range 140 170MHz 88 108MHz Note You can only choose to work at 88 108MHz or 140 170MHz and the two frequency bands cannot exist on one board at the same time Input 0 3 0 5WOutput 6WInput and output impedance 50ΩInput and output terminal SMA k female external thread inner hole Typical gain 10dBMaximum gain 11dBSupply voltage 12V 15V Max Working current 1 1 5ASize 8 x 4cm excluding protrusions Weight 97g including radiator Weight 18g excluding radiator Package included 1 x Digital Power Amplifier BoardNote Be sure to use a coaxial cable to connect to the outdoors and the antenna is GP or J type Never use a rod antenna to directly connect to the output port it will not work properly and the antenna should resonate at the working frequency and the standing wave should not exceed 1 5