Made of fireproof ABS material, durable, firm, and designed for long service life. Automatically controls the power supply of electric devices based on the water level setting. Fast induction and high sensitivity enable timely water level control. Helps protect water pumps and extend their operational life for efficient performance. Supports automatic water replenishment and drainage. Easy to install following the included manual. Features indicator lights: red for power, green for output. Available in two configurations: with switch or without switch, for simple operation. Suitable for use with sewage systems, residential water pumps, water towers, pools, and industrial equipment. Item Type: Automatic Water Level Controller Material: ABS Size: 92x66x49mm (3.6x2.5x1.9 inches) Color: Grey Optional Types: A, B, C, D Control Distance: less than 50 meters Rated Current: 30A Rated Voltage: 220V Quantity: 1 piece Note: 1cm = 10mm = 0.39 inch. Slight variations may occur due to manual measurement. Monitor differences may affect color representation. Package Includes: Type A: 1 x Automatic Water Level Controller Type B: 1 x Automatic Water Level Controller, 3 x 2m Sensor Type C: 1 x Automatic Water Level Controller with switch Type D: 1 x Automatic Water Level Controller with switch, 3 x 2m Sensor