Featuring a plug and play design, the AutoAqua Smart Level Security automatically detects the water level status when mounted. The magnetically-coupled sensor makes it easy to adjust to the desired level to secure your aquarium. Use this to prevent your aquarium from overflowing or equipment from running dry. When the water level status changes, Smart Level Security will shut down the equipment immediately. Integrated Auto time delay prevents false alarms due to power outage. Power Input / Output: 100 ~ 240VAC, 10Amp. Max Power: 1100W for 110VAC / 2200W for 220VAC. Max Mounting Thickness: 1/2 inch (12.7mm).