A Selective Amplifier 10dB for FM/VHF region. Note that some devices to be used SMD components and may have a minimum sales volume. Device works very well as an FM external amplifier `when used for example in car / boat etc . Thanks to GF3 filter, amplifier blocks out unwanted Many Signals. PCB is single side design. Working voltage 8 ... 20 VDC, supply current <30mA.