Illuminated Push Button Timer, 3 Core - 

The 3875A-1 from Elkay is a 3-wire push button timer. This electronic time delay switch for lighting and other power use, the push button timer can replace an existing switch to provide energy saving functionality by timing lighting and power sources off to avoid unnecessary power usage. This intelligent unit provides variable timing selection with a backlit blue neon indicator ring aiding location in the dark. It also has the ability to latch back on to the mains power supply and reset in the event of a power cut. The product has time ranging from 2 minutes to 2 hours. It is also suitable for multi-way applications.