GLCE ENERGY BMS: The protective board is for 4 LiFePo4 series batteries, it can be used for 3.2V iron lithium batteries. Overload Voltage Detection: 3.65±0.05, DC Current: 30±5mA, Over Discharge Voltage Detection: 2.3±0.05, Working Temperature: -20℃~60℃/-1/-10 5.6℃ ~ 140 °F Multiple protection: over-charge protection, over-discharge protection, over-current protection, temperature protection, short circuit protection, balance function. 【Quality Guarantee】Adopt top quality (A-level) protective integrated circuit IC, Mos and PCB. Waterproof, dustproof and shockproof, which helps to keep the battery healthy and stable and extend the life of the battery. ISO/FCC/RoHS/PSE/CE Approved Box contents: LifePo4 common port BMS + balance wire + temperature probe + wiring instructions Note: BMS can not be used in parallel or in series for 2 and 2 other batteries in 1 circuit. This is a standard BMS, does not support communication functions and modify parameters.