and high quality;Made of high quality material, durable and practical to use The main IC uses the imported "precision" components.With overload, excessive discharge, short circuit, overcurrent protection, suitable for a variety of different forms of 3 N capacity lithium battery. Using Japanese precision protection IC, VISHAY, EOS, IR and other high quality MOSFETs, FR-4 Low temperature plate, carefully designed to test the compact size. Suitable for many high integration requirements and low cost occasions.It can meet many performance requirements, to ensure the total safety of the battery pack.Low current consumption.The performance is stable.Fine workmanship and durability. Connection instructions: B + Connect battery + Battery with connection B- P + for battery output + P-for battery output input- Overload release voltage: ± 0 4.23. 05 V Overload voltage range: 4.25 ± 0. 05 V Overload voltage range: 2.54 ± 0. 1 V Overcurrent detection current: 1-3 A Main functions: overload protection, overload protection, short circuit protection, over current protection. Colour:Silver + green Material:metal Size:Length: About 90mm Package Contents: 1000 x Protection Plate With Soldering Strip