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parmater : Working Voltage: 10.5V~16V Working Current: 30mA~70mA Rating Voltage: 13.2V Rating current: 50±5mA Working frequency: TV 48.5MHz~870MHz Output gain: TV 20±3dB Impedance: 75Ω standard conector: 3.5 DC male connector stand cable: 1.5C-2V