1,In-car RF transmitter 2,Carrier frequency:863.5,864.5MHz /914- ... 915MHz 3, Over 50 meters range 4, Small order accepted In-car RF ... Stereo Wireless Headphones transmitterThe TX-20RF is RF wireless Transmitter with clear stereo ... 75dBTHD: <1%Power Requirement: DC 12VPicture: High frequency RF transmitter with dual channel for car