Specification: Item Type: Booster Pump Working Voltage: 24V Insulation Class: Class H Supercharging Effect: 80Pa Noise: Low noise Open Mode: Automatic water control : 20L/min Head: Approx. 23meter Piping Inner Diameter: Approx. 15mm / 0.59in Fluid Temperature: 0-65 1 x Pump 1 x Power Adapter 1 x Water Pipe 1 x User Manual 2 x Screw 2 x Expansion Screw Note: 1. Friendly Reminder: The water pump has a built in water switch valve. The minimum rate of 1.5L/min need to be met before the valve can be flushed to start the pump. If the water switch cannot be flushed, the power supply must be disconnected again for 35 seconds, and the water pump will be forced to start for 10 seconds. If it is powered on and works for 10 seconds, it will automatically stop, indicating that the water switch valve is not opened. 2. Test Method: Take a mineral water bottle and connect. Generally, a mineral water bottle is a 500ml bottle, and about 3 bottles can be connected in one minute, which can be installed and used. 3.Only white (manual & automatic) can provide mode switching function