This is a simple, low cost infrared lap timer. The transmitter creates a ##Q##wall##Q## that triggers the timer as it passes through, giving immediate, accurate feedback for lap times.
There is a cord connecting the Timer and Receiver so that each can be best placed,
the Timer for ease of reading while on track and the Receiver for picking up the Transmitter signal.
Multiple transmitters can be used for timing A to B events or getting split times on a