The S3 uses a proprietary electronic sensing technology and is engineered to operate in any bilge water mixture without failure and reduce continuous cycling. Fully sealed electronics are protected from water or chemical damage. It can be mounted on the floor of the bilge or directly to a stringer. Compatible with all competitive products with no moving parts. 5-Year warranty. 2.73" H x 3.16" W x 1.68" D. 36" lead wire. Volts 12 Amps 15