Enhanced Battery Safety: Daly 12V BMS 4S offers protection against overcharging, overdischarging, overcurrent, short circuits and extreme temperature, ensuring the safety and longevity of your battery pack. 2-in-1 Bluetooth/Wi-Fi Dongle: Easily connect with the app via Bluetooth, or switch to Wi-Fi for long-distance control when Bluetooth is out of range (requires connection to a Wi-Fi router). Remotely monitor battery status and adjust parameters via the mobile app or PC software – whether you're at home, traveling, or operating a trolling motor. Remotely monitor battery status and adjust parameters via the mobile app or PC software – whether you're at home, traveling, or operating a trolling motor. The built-in parallel circuit of Daly BMS can support the parallel use of battery packs and 485/CAN Bus parallel communication, which is suitable for mainstream inverters on the market. 3 Years Warranty. Packing List: 4S 12V 300 amp Smart BMS (x1), B-P-Output Line (x2), 2-in-1 BT/Wi-Fi Dongle (x1), Sampling Cable (x1), NTC (x1), CAN/485 5-pin (x1), Manual (x1). Easy to install, everything you need for setup and operation.ISO/FCC/RoHS/PSE/CE APPROVED. Dongguan Daly Electronics Co., Ltd. was established in 2015, integrating R & D, production and sales, and specilizing in the production of lithium battery protective boards, such as LiFePO4 BMS, NMC BMS, LTO BMS, which can be used to energy storage, electric vehicles, electric tools, electric wheelchairs, AGVs, and forklifts, etc. The specifications of Daly BMS are 3S – 32S, 12v-120v, and 5A-500A. Smart BMS, BT, UART, RS502, can, LCD and GPS are very popular in Europe, Asia and North America.If you need a customized BMS or bulk order, please feel free to contact us!