Reliance Controls Corporation THP111 SoniCord Power Failure Alarm Cord Simply plugs into any 120V home outlet Includes arc-fault circuit breaker nuisance tripping Perfect for use with refrigerators, freezers, sump pumps, aquariums and more Has On/Off switch and convenient retaining straps are included to secure appliance plug Includes built-in rechargeable NiMH battery and emits 80db signal for 2.5 hours when power fails to appliance