Features: - 100% brand new and high quality - Made of high quality materials, durable - Automatic water supply system for domestic water towers - Aquarium fish tank water change system - Automatic control of conductive liquid - Livestock automatic feeding system - Farm automatic water supply system - and other situations where automatic water supply and water changes are required. - Solenoid valve water pump motor automatic control Interface Description: - High: upper limit probe - output: output probe - Low: Lower limit probe - +: Power terminal 1 (regardless of positive and negative) - IN-: Power terminal 2 (regardless of positive and negative) - NC: Relay normally closed contact - COM: Relay public communication - NO: relay normally open contact Work guide: - Water level rise: When the water level is lower than the "low water level", the water pump starts to supply water to the water tower; when the water level is higher than the "high water level", the water pump will stop water supply. - Lower the water level: When the water level is lower than the "high level", the pump does not work and the water level continues to drop. When the water level falls below the "low water level", the pump starts to supply water to the water tower. Product parameters: - Working voltage: DC 12-15V (AC 9-12V) - Standby current 10MA - Working current 40MA - Dimensions: 54mm X 27mm X 19mm - Weight: 24g - Maximum load: 10A/250VAC, 10A/125VAC, 10A/30VDC, 10A/28VDC, 10A/12VDC Package Included: 1 *DC 12V AC 9V Level Controller Sensor Module Notes: 1. Due to various factors such as display brightness and light brightness, the actual color of the product may be slightly different from the website picture. 2. Please allow a slight deviation between the data and the manual measurement.