Dear，Pls leave a massage to tell us what design (Color) do you want.thank you.

There are two types of lithium batteries on the market ， with a charge management chip ， a chip without charge management ， lithium battery needs chargingmanagement chip electrical impulse ， or prone to explosion.Second， the technical conditions:- The output voltage :12V- between the wire resistance 10.5 ± 0.5Ω- Insulation resistance 10MΩ (DC100 megger )- the maximum pressure 0.6Mpa outlet closed- the outlet opening maximum pressure 1.2Mpa- Start pressure 0.05MpaThird， the mechanical properties and the operating environment:- Appearance: generator surface clean ， no rust， no scratches when significant ， solid structure .- axial clearance 0.2-1.0mm- mechanical noise ≤55dB- the amount of the Generator : 90g around- generator life : ≥3000hPackage Include:1 x DC 12V DC generator 10W micro-hydro water turbine generator water F LED lights