CP/TX-V is a dual transmitter (It mounts in the vestibule between the doors and can be used for independent activation of two separate doors) Product features selectable frequencies: HDRC ™ , 300 MHz and 390 MHz. Clearpath™ provides the most reliable wireless activation in automatic doors. Transmitter feature SignalLock™ that will guarantee the radio signal is transmitted every time a switch is activated. CP/TX-V comes complete with transmitter, integrated signal enhancing antennas, wire harness, and 9V battery, Installed in a 1015 surface mounting box.