Universal radio control products. All products feature selectable frequencies: HDRC, 300 MHz and 390 MHz. All transmitters feature signalLock that will guarantee the radio signal is transmitted every time a switch is activated. CP/TX-R4 comes complete with transmitter, integrated signal enhancing antennas, wire harness and 9V battery installed in surface mounting box. Coble with 59R4-H, 59R4-HSS.