The Audio Ltd. SwitchiR IR Controller for miniTX, TX2040 and HX2040 Units is a custom-designed compact controller for use with the miniTX, TX2040 and HX2040 transmitters. The controller can be setup simply by pointing the front IR port of the controller to the IR port of the transmitter or receiver within a distance of 11.8" (30.0cm). With this key fob sized controller you can control all the settings of the TX2040 and HX2040 units while monitoring the status of the device. With just four buttons, a LCD display and a simple menu system it gives complete control to sound professionals. In addition, it also includes a built-in 9V battery tester. When not in use, the SwitchiR saves power by switching off automatically.