PERFORMANCE TEKNIQUE ICBM136 40ch WIRED DIGITAL FM STEREO TRANSMITTER Performance Teknique ICBM-136 40 Channel Wired Digital FM Modulator,You have to hard wire to 12 volt power. In the vehicle Small Compact Design, Dimensions: Height: 1.6" Width: 3.3" Depth: 1.2" Digital Read Out, Interfaces/Ports: 2 x RCA Jack Frequency Band/Bandwidth: 88 MHz to 92 MHz FM, Good audio quality and signal strength Ships From and Sold by CarAmpAndSpeaker