stability of your power tool with our 21V lithium battery Protective board, efficiently protective your batteries. Crafted from metal, this board offer heat dissipation and reliability for demanding tasks. for professional tool users, enthusiasts, and repair technicians enhances performances and safety. Perfectly suited for use on construction sites and various power tool maintenance scenario. Upgraded your power tool accessories with this essential component, ensuring functionality and extended battery in all your projects. Wire color is random and cannot be specified Only the above package content, other products are not included. Note: Light reflection 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.