Features: For 3S 12V 18650 liion battery packs, this BMSs safeguards against overcharge, over discharge, and short circuits, ensuring safe operations for low power devices like massage tools and solar street lights. Featuring PCB structure with balanced cell monitoring, the compact board supports 12V output and integrates seamlessly into electronics projects requiring stable lithiums battery management. for electronics hobbyists, solar systems installers, and developers creating backup power solution for LED lighting or portable 12V appliances. Perfect for integrating into solar powered monitoring systems, emergencys light backups, or battery packs for low wattage electronic devices under 550W. Optimized for nonmotorized applications, this protections module excludes high drain uses like e bikes or power tool while prioritizing safety in 12V consumer electronics and renewable energy setups. Specifications: Materials: PCB Size: 51x10x3mm Package Includes: 1PC lithiums Battery protections Board note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.