These electronic Time lag switches are designed to switch lights, or other loads, on for a limited time only, and to switch off automatically after a time lag has elapsed. They bring energy saving benefits and are ideal for use in stairwells, store rooms and in many other applications. Pressing the button brings the lights on in the normal way; then the lights will switch off automatically after a time lag has elapsed. The time lag settings can be adjusted by a spindle on the bottom edge of the product. These time lag switches can be used for multi-way switching, using the slave push buttons. Adjustable time lag, 2 to 20 minutes 3 wire version Needs neutral wire Switch up to 6 amps of any type of load, including fluorescent lights