The Sensor Switch NPP16-D-ER-EFP NLIGHT Relay Emergency Power Pack is a reliable and essential component for ensuring facility lighting during power outages. With a voltage of 120, this product is designed to quickly switch on emergency lighting in case of a power failure. Its compact dimensions of 2.50" height, 3.50" length, and 3.50" width make it easy to install in various locations throughout a business or industrial facility. The red color of the product adds visibility and helps with easy identification in case of an emergency.