Multi-optimal integration scheme, high-quality MOS tube impact resistance, low temperature riseOvercharge and discharge protection to prevent overcharge and discharge of the battery,Overcurrent protection to prevent abnormal high current of battery.Balance protection, battery voltage balance, make battery life , Stable heat dissipationDifferent batches, product appearance and color may be different, does not affect the use.Material: PCBcolour: greenPackage Contents:1 x Protection BoardOnly 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.