This product is a water level control module, it is designed according to the actual needs of water for household, factory and mines. It controls the high-current relay to control the water pump work and close by detecting the level of the water, and realizes the automatic pumping of the water when the pool (water tower) is short of water.When the water is full, the purpose is automatically stopped, so that the pool is always full of the water. The circuit has an LED indicator to indicate the working state. When working, the relay pulls the LED light, and when it stops working, the LED goes out.The product has the characteristics of small size, simple wiring, low consumption and strong anti-drying ability. and the wiring ports are oriented in the same direction, which greatly facilitates the connection of the leads.Name:Automatic water level control moduleWorking Voltage:AC 12V or DC 10-14VWorking Current:Above 600mHALoad Voltage:AC: less than 250V; DC: less than 28VLoad Current:Less than 10AModule Size:51x40x18mmMounting Hole Spacing:44x33mmcolor:GreenMaterial:plasticPackage Contents:1 x Water Liquid Level ControllerOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.