1,In-car RF transmitter 2,Carrier frequency:863.5,864.5MHz /914-915MHz 3, Over 50 meters ... of car audio devicesPLL system for ultimate frequency stabilityTechnical Data:System: UHF/RFModulation: FMMode:StereoCarrier Frequency: For Europe: 863.5, 864.5MHz ... -to-noise Ratio: >75dBTHD: <1%Power Requirement: DC 12VPicture: High frequency RF transmitter with dual channel for car