The hand held unit has a multi function transmitter and receiver (20) that is powered by a built in battery cell (21) and handles control, radio and light signals. The unit has a built in laser (6) for use as screen pointer and includes a microphone (5) for signal detection. Built into the underside is a roller ball that is used for control. The top side has a number of push button inputs (2-4) that are used for control purposes.
