Liberty Pumps ALM-2-1 Indoor High Water Alarm The Liberty Pumps ALM-2-1 Pump Alarm is a standard, indoor-rated warning system for sump, sewage, and effluent applications. This model features a narrow-angle float switch with a 10' cord, making it suitable for sewage and effluent applications. The alarm operates on 115V AC, with a 9-volt battery backup included to ensure operation during power loss. When a high-level condition is detected, the alarm sounds an 86 Decibel horn and illuminates a bright red LED alarm ring. It also features a green power "ON" light, a manual Test/Silence button, and an automatic alarm reset. For integration with other systems, it includes auxiliary contacts. Features: Indoor rated 115V operation with 9 volt battery back-up Thermoplastic enclosure 86 decibel horn Red LED Alarm Ring Green “power-on” light Auxiliary contacts Automatic alarm reset Test / Silence buttons 9 Volt battery included