Part Number:1 Guaranteed software updates until:unknown Welcome to my store , Hope you have a pleasant shopping trip! Description: 1>.Accurate water level detection; 2>.Effective protection from external conditions; 3>.Programmable control strategies; 4>.Multiple protection functions; 5>.Automatic water extraction; 6>.Easy installation, operation and maintenance.Parameter: 1>.Working voltage: DC 5V 2>.Relay electric shock capacity: 3A/250V 3>.Work Temperature:-40~85 4>.Work Humidity:5%~95%RH 5>.Size: 70*45mm/70*23mmFunction description: The liquid level controller can achieve two functions: (switching by Button S1): 1>.Three color LEDs indicate low, medium and high water level. When the water level is low, the relay is energized (external water pump works), and when the water level rises to the high water level, the relay is disconnected (water pump stops working). This process is repeated. This function is applied in automatic water adding devices, keeping the water level between low and high. 2>.Three color LEDs indicate low, medium and high water levels. When the water level is high, the relay is energized (external solenoid valve works), and when the water level drops to the low water level, the relay is disconnected (solenoid valve stops working). This process is repeated. This function is applied in automatic water draining devices, keeping the water level between low and high.Package List: 1 x Liquid Level Controller Module Accurate water level detection. Automatic water extraction. The Power Supply Voltage Is DC 5V. Easy installation, operation and maintenance. SHOP WITH CONFIDENCE: To provide you with the highest quality service, If you have any question, please feel free to contact us.We will provide after-sales service until you are satisfied. See more product details Accurate water level detection. Automatic water extraction. The Power Supply Voltage Is DC 5V. Easy installation, operation and maintenance. SHOP WITH CONFIDENCE: To provide you with the highest quality service, If you have any question, please feel free to contact us.We will provide after-sales service until you are satisfied.