Elkay ELKAY 3875B-1 Standard Push Button Timer, 3 wire Master, ABS, White

The Standard Push Button Timer is an energy saving device to switch loads for a pre-selected time period. It fits easily into a British Standard back box of 25mm depth and does not require a neutral. The timer can be interlinked in parallel with other Elkay timers to create multiply switching points. It can also replace an existing switch at the switch point to provide energy saving functionality by timing lighting off to avoid unnecessary power usage.