Features: This 4S LiFePO4 Battery Management Systems features advanced current management technology to ensures optimal protected for each battery cell during charging/discharging. Ideal for instruments requiring stable power supply, it prevents battery damage. Built in smart thermal management Systems effectively prevents overheating and extends product life. Perfect for high load applications like lab equipment and industrial tools, ensuring safe operations. Made with premium metal materials offering wear resistance and impacts protected. Outperforms plastic alternatives, making it suitable for outdoor use or harsh working environments. Supports various LiFePO4 battery models, easily adapting to different devices. Eliminates compatibility concerns for professional managing multiple equipment types. Simple design allows tool less quick installation, saving time for users. Particularly convenient for frequent battery changes in emergencies maintenance situations. Specifications: Component:Metal Color: blue Size: 10.1X6cm Current: 100A Overcharge protected voltages: 3.65V Over-discharge protected voltages: 2.35V Balanced current: 5A (maximumly) Note: Continuous charging and discharging from 80A to 100A, 300A in 0.002 Seconds in an instantly. Package Includes: 1 Set Battery Management Systems note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.