The Little Giant HWAB 513288 Indoor High Water Alarm is used to notify of high water levels in sump basins, holding tanks, lift chambers, and sewage and water removal systems. It includes a horn with a silence switch which sounds when a threatening liquid level condition arises. It has a red LED warning light that illuminates during such conditions and remains on until the condition is fixed. This Little Giant HWAB 513288 Indoor High Water Alarm has a mechanical float switch that comes with a 15' power cord. This alarm uses a 9VDC battery backup ensuring that the alarm keeps working even if primary power fails. The voltage needed to run this pump is 115V single phase. The Little Giant HWAB 513288 Indoor High Water Alarm proudly bears the UL and the CSA marks and is recognized for meeting the required environmental performance standards. Little Giant and its parent company, Franklin Electric, have been making pumps for over 70 years. The quality, durability and dependability of their products have made them a world leader in pumps of virtually every variety.