1,In-car RF transmitter 2,Carrier frequency:863.5,864.5MHz /914-915MHz 3, ... 4, Small order accepted In-car RF Stereo Wireless Headphones transmitterThe TX-20RF is RF wireless Transmitter with clear stereo sound for car ... -noise Ratio: >75dBTHD: <1%Power Requirement: DC 12VPicture: High frequency RF transmitter with dual channel for car