Superior Pump 92060 Sump Alarm System with 15-Foot Tethered Float Switch, Black Monitors liquid levels in sump and sewage basins, holding tanks and other water applications Non-corrosive NEMA enclosure, rated for indoor use 9 Volt battery backup, battery not included 87 Decibel alarm horn with low battery chirp Comes complete with alarm, 15 foot float switch and mounting clip