[Active Equalizer]Can be used alone or compatible with any brand of BMS.Suitable for Li-ion/LifePO4 battery packs [Working Principle] Balanced by energy transfer, with high efficiency, less energy loss and low heat generation. Ensure battery consistency and extend the battery life. Balanced current: 0.1-1A, Voltage equalisation accuracy: 0.01V； [24-hour equalization] Not limited by battery charging, discharging or static, sleep mode, etc. Intelligent detection of battery voltage, automatically turn on/off balancing. [Smart active balancer]Support UART/RS485 communication, Bluetooth APP can view battery balancing information at any time. Indicator light on/flashing: balanced state; indicator light off: non-balanced state/fault. [Satisfactory Service]: We Provide 24-hour online service,If you encounter any problems, Please feel free to contact me, we will give you a perfect solution. This is DALY Smart Active Balancer is friendly to all bms , can be used in parallel and fast equalized the voltage difference . Daly Smart active balancer with a bluetooth dongle , can be check each cell voltage in real time Pls be sure that active balancer cannot be used as an BMS !!! if you want to keep your battery pack in healthy condition long life cycle , please use daly bms and daly active balancer together. You are welcome to buy daly products in the only DALY OFFICIAL Amazon STORE. Any questions pls contact our online service directly ~