FunctionLight and smallPerformancc stableEasy to sctupTV and Radio FM Specification 1.Radio Frequency: 88-108MHZ2.TV: VHF40.5-223MHZ UHF450-862MHZ3.Plus(Radio): 18dB4.Plus(TV): UHF22±3dB VHF20±3dB5.Cable : RG174 Impedance: 50 OHM Length: 5.0M+plug6.V.S.W.R: ≤3.0:17.Working voltage: DC12V8.Working current: 30-50mA