This System T20 can be easily used when you must control an application with the help of a radio and require a maximum of 3 functions where only one function at a time is to be used. For instance this can be used when need to open or shut a door or want to turn on or off a lamp . The T20 offers a variety of options, around 1000 objects can be controlled with the same transmitter like for instance 1000 gates. Up to 60 transmitters can be programmed in to one receiver if more than one person needs to use the control. It can transmit at 433.92 or 869.85 MHz. It is highly cost efficient and is easy to install as well use.