1AUTOMATIC SENSOR SWITCH CONTROLLED BY WATER FLOW: Your faucet turns on or off and the water pump turns on or off automatically. Before turning on the water pump, please turn on the faucet to ensure that there is water flowing through the water pump 2AI INTELLIGENT LEARNING: Intelligently learn the water flow and air in the water pipe, regardless of whether the water pressure matches the situation, which is a more effective booster solution 3LOW PRESSURE START: The small machine cannot start automatically when the water flows through. You can press the switch button to switch to low pressure mode operation to ensure that the small flow can start 4WATER SHORTAGE PROTECTION: When the water inlet in the pump is close to zero pressure, the pump will stop working and automatically protect 5TECHNICAL PARAMETERS: Can be used with both tank and tankless water heaters. Maximum flow is 4.4GPM and maximum lift is 65feet. Input power is 80W, energy savingItem Type: Booster Pump_x000D_Working Voltage: 24V_x000D_Insulation Class: Class H_x000D_Supercharging Effect: 80Pa_x000D_Noise: Low noise_x000D_Open Mode: Automatic water flow control_x000D_Flow: 20L/min_x000D_Head: Approx. 20meter / 65.6ft_x000D_Piping Inner Diameter: Approx. 15mm / 0.59in_x000D_Fluid Temperature: 0-651 xPump1x PowerAdapter1 x Water Pipe1 x User Manual2 x Screw2 x Expansion Screw1. Friendly Reminder: The water pump has a built in water flow switch valve. The minimum flow rate of 1.5L/min need to be met before the valve can be flushed to start the pump. If the water flow switch cannot be flushed, the power supply must be disconnected again for 3?5 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 flow switch valve is not opened._x000D_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._x000D_3.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.