, How:1. The pump has no power supply and is a DC powered pump. AC 220V voltage can not be used directly.2. The ground must allow water to flow to the pump (non-self-service primer pump) and the installed water level is higher than the pump.3. Keep the water clean so as not to block the pump impeller. The pump needs to be cleaned regularly to keep the pump clean. Feature:DC Voltage: 2.5-6V Type: Horizontal/Vertical Max Elevator: 40-110cm/15.75"-43.4"Flow Rate: 80-120L/HHinner Water Diameter: 7.5mm/0.3inOutlet Diameter: 4.7mm/0.18"Diameter: Approx. 24mm/0.95inLength: Approx. 45mm/1.8"Height: Approx. 33mm/1.30inMaterial: Engineering PlasticsDrive Mode: DC Brushless Design, Magnetic Drive500 Hours Continuous LifePackage Included:1*Micro DC Submersible PumpHi, guys, thank you for visiting my store. There are so many useful and cheap items in our store. We will be ready to reply you as soon as possible.