Features: Original BMSs Protections Board for 4 Lite ensures precise current control during charging and discharging, enhancing lithiums battery efficiency and safety for long device performances. Engineered with plastic construction, this battery management systems prevents overcharge and over discharge while maintaining optimal voltages stability for electronic accessories. for professional and frequent travelers who demand power solution for smartphones, tablets, and portable gadgets during business trips or daily commutes. Keep devices safeguarded during extended outdoor adventures or high intensity work where stable battery output for uninterrupted productivity. for 4 Lite models, this essential lithiums battery protections board integrates seamlessly into modern lifestyles through intelligent energy regulation capabilities. Specifications: Materials: Plastic Size: 246x64mm Package Includes: 1PC BMSs 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.