The SS400 Series is ready to provide energy savings as an automatic off switch. Fill every switch position so lights cannot run when no one is there. This energy saver is ready for residential or commercial voltages (120 - 277V) and unusual wiring requirements (3-way or multi-way.) Factory preset for energy code 2 hour maximum, it can be customized from 5 minutes to 24 hours. Build and listed for LED lighting, this robust timer is can take on moder lighting. But not just lighting, the SS400 Series can handle motor loads and contactors.