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: 200*Protection Plate With Soldering Strip Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.