Feature: 1. Automated Process: Using for STM8 chip as the control core, the water level will automatically stop when the water level is higher than the upper water level, and the water level will be automatically filled when the water level is lower than the lower water level, the whole process is automated without manual management 2. Easy To Install: The mounting hole is M3 screw hole, which is easy to install and simple to operate 3. Good Current Passing Performance: The PCB adopts 1.6mm thick double sided plates, 2.0 ounces of brass thickness, and tin spraying process to ensure good current passing performance, the layout is neat, reasonable and beautiful 4. Widely Used: Widely used in water conservancy storage facilities, water towers, buckets, water tanks, pools, etc. 5. Relay Output: This water level controller module adopt relay output, automatic control type, very convenient Specification: Item Type: Water Level Controller Module Product Model: HCW-M203Working Voltage: AC DC 12V Output Capacity: 10A Output Type: Relay output Control Type: Fully automatic Product Size: Approx. 60 x 40 x 18mm / 2.4 x 1.6 x 0.7in Mounting Hole: M3 screw hole. Package List: 1 x Water Level Controller Module Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.