The outlet closed the maximum voltage: 0.6Mpa The water outlet open the maximum voltage : greater or equal to 1.2Mpa Start water pressure :0.05Mpa Rate range: . 2.5-25L/min Size(L x W x H): . 84x49x30mm / 3.3 x 1.93 x 1.26inch Appearance: generator cleaning, no , the structure is strong. Axial space: 0.2 - 1.0mm The mechanical noise: less than or equal to 55dB Generator single volume: 90g The life of generator: greater or equal to 3000h Output characteristics: the output voltage with no voltage regulator is proportional to the water pressure Note: There are two kinds of lithium batteries on the market, with a charging control chip, and without charging control chip. charging needs charging control chip, otherwise it's easy to have a blast. Colour: black Material: plastic Package Contents: 3 * Mini Hydro Generator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Output high voltage: 12V (1.2Mpa) Output Current: 0-150mA Line resistance :10.5 + 0.5&; Insulation resistance: 10M&; (DC100)