Feature:1. Water level sensor controller, supports automatic water pumping, filling and draining.2. According to water level of the detection pool (water tower), the highcurrent relay is controlled to realize the control.3. Small size, low power consumption, large switch capacity, strong antiinterference, high functional stability.4. Stable realization of water pump when the pool (water tower) is short of water, and automatically stops when it is full.5. Using highquality materials, excellent performance, easy wiring, and long service life.Specification:Item Type: Water Level Controller ModuleMaterial: PCB Board Eletronic ComponentCharging Power: 10ASize: Approx. 60x50x22mm / 2.4x2.0x0.9in.Package List:1 x Water Level Controller ModuleNote:1. Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Have a great time shopping!