Detects Electricity on your Dock frame and in the water around your Dock. With this app, you will receive a push notification when we detect electricity in the water or on your lift or dock frame. Some features of the Dock Lifeguard system includes: Ability to turn off power to your dock by tripping GFCI breaker, Able to run off DC Battery, AC, or AC w/battery backup, Dry contacts to trip relays to trigger external sensors and alarms, Alarms via Super bright LED indicator, Loud Audible Siren (90+ dB), visual indication of amount of stray voltage being detected by an array of LEDs.