1. Feature: 2. Made of fireproof ABS material, durable, firm and has a long service life. 3. It can automatically turn on or off the power supply of all electric devices according to the water level the users set. 4. Fast induction, high sensitivity, quick control the water level in time. 5. Well protect the water pump, extend the lifetime, let it work efficiently. 6. Auto water replenishment and drainage, easy to install according to the manual. 7. Indicator light design, red light for the power, green light for output. 8. Two patterns optional: with switch or without switch, easy to operate and use. 9. Suitable for sewage disposal, home water pump, pump, water tower, pool, production equipment, etc. 10. Specifications: 11. Item Type: Automatic Water Level Controller 12. Material: ABS 13. Size: 92x66x49mm/3.6x2.5x1.9in 14. Color: Grey 15. Optional Type: A, B, C, D 16. Control Distance: less than 50 meters 17. Rated Current: 30A 18. Rated Voltage: 220V 19. Quantity: 1 PC 20. Note: 21. Transition: 1cm=10mm=0.39inch 22. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 23. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you 24. Package Includes: 25. Type A: 1 x Automatic Water Level Controller 26. Type B: 1 x Automatic Water Level Controller 27. 3 x 2m Sensor 28. Type C: 1 x Automatic Water Level Controller with switch 29. Type D: 1 x Automatic Water Level Controller with switch 30. 3 x 2m Sensor