ShockAlarm is a floating, continuously monitoring alarm that protects your family and friends from Electrical Shock Drowning. It detects stray electrical currents that could be potentially dangerous. This is a passive device which means it isn’t connected to an electrical system that could pose added dangers when around water. ShockAlarm will sound an alert and flash a warning light when electrical current is detected. Perfect for monitoring pools and around boats and docks. Features: • ShockAlarm is in constant contact with the water while monitoring. • Simply activate and put it in the water to use. • Battery operated – does not introduce electricity into the water. • The device is totally portable and can be taken with you to different monitoring sites. • ShockAlarm is a totally enclosed, waterproof system.