: Advantages: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information 2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3,High efficiency,durable material.4.Low flow loss and low water pressure.5.This generator will actually charge a battery.6.Operates with lower water pressure,which is good for your application. SpecificationColor: BlackShell material: NylonWorking pressure: 0 to 1.75 MpaTest pressure: 1, 2 MPaTemperature range:0 to 120 degrees CelsiusMaximum Flow: 30l/minFlow range: 1.5-20L/min (press 0.05-0.2MPa)Size: approx. 8 x 4cm/3.15 x 1.57 inch(L X Dia)Weight:840g Package included:5 x Micro-hydro Generator