Feature: 1. Using pressure‑resistant materials, the product has a good pressure‑resistant effect, and will not be damaged. 2. The perfect match of the strap and the bottom of the screw can better fix the battery box and use more securely. 3. Can be carried with you, charging is more convenient when going out, real‑time monitoring of voltage makes going out and playing more fun. 4. With dual USB charger sockets, 12V sockets and high current output terminals. 5. High safety factor, with strict quality control and quality assurance, can be used with peace of mind. Specification: Item Type: Battery Box CoverProduct Material: PP Purpose: Outdoor charging Fixing Method: Double fixing with strap + base screw USB Socket Mode: 5V 1A/5V 2.1A Cigarette Lighter Socket: Yes Suitable Battery Capacity: 100Ah Suitable Battery Voltage: 12V/24V How to Use: 1. Connect The Battery: Connect the red wire to the positive pole and the black wire to the negative pole; 2. Output Device Connection: Turn on the power switch, connect the device that needs power supply to the corresponding connection outside the battery box, and turn it off when not in use; 3. Voltage Display: Press the button under the display to display the voltage.. Package List: 1 x Battery Box Cover1 x Battery Box Compartment1 x Band2 x Screw Holder1 x Screw Pack1 x Partition