Features Function Support:Water level switch can be used for automatic pumping, filling and draining in pools, garages, basements and flooded areas. Water Level Detect: According to water level of the detection pool (water tower), the high‑current relay is controlled to realize the control Auto Turn on/off: This DIY sensor module kit turns on automatically when you can keep the swimming pool pump (water tower) stable. The pump automatically stops pumping to the maximum extent. Developed based on the real needs of pumping water from factories and homes. Water level sensors are based on the detection (water tower) to control the level of high current relay to achieve control. With simple wiring, water level switch keeps low power consumption and large switching volume. Specification: Item Type: Water level switch Material: Electrical components Voltage: 12VDC Charging Voltage: AC <250V DC <30V Charging Power: 10A Package List: 1 x Water Liquid Level Controller  Package List 1 x Water Liquid Level Controller