Features:   *12V Water Flow Pump Micro Hydro Generator *Perfect for energy conversion of the water into electrical energy mechanical equipment *Directly used to charge small battery, mobile phone, or power supply for LED lights, etc   Specifications:   *Output current: Max. ≥220mA *Line resistance: 10.5 /- 0.5ohm *Insulation resistance: 10 Mohm (DC100 megohmmeter) *Closed outlet pressure: Max. 0.6Mpa *Opened outlet pressure: Max. 1.2Mpa *Start water pressure: 0.05 Mpa *Axial clearance: 0.2-1.0mm *Mechanical noise: ≤55dB *Output characteristics: output voltage without the voltage regulator circuit is proportional to the water pressure *Installation: standard household 1/2 inch water pipe (Outer diameter:20mm, inner diameter:13mm) *Voltage: 12 V *Color: Clear Yellow (As Pictures Show) *Material: Plastic *Size: 8.8 * 5.8 * 3.9 cm (Approx. )  Package Contents:   4*Mini Hydraulic Generator