Features Voltage, Current Display: This board features voltage and current dual display, you can monitor voltage and current changes at any time, more convenient and intuitive. Wide Compatibility: This board supports both for IOS and for Android system equipments. Rest assured to choose it! Automatic Identification: This board can intelligent automatic identification of positive and negative poles, easy and time saving. Easy Carrying: Comes with small size and lightweight, you can easily take this board with you to help with your work. Safe Use: The board has functions like automatic power off, charging status prompt, high current load protection. You can use the board safely and confidently! Specification: Item Type: Battery Activation Board Material: PCB Package List:1 x Battery Activation Board2 x Connecting Cable  Package List 1 x Battery Activation Board 2 x Connecting Cable