Simple to operate - Just figure out what V your device's power specification output is, we support 12V devices, plug the adapter into wall power, connect our UPS battery, and plug our product into your device. It's that simple. What You Get - 1* 15000mAh UPS power bank, 4* DC Output Interface, 1*AC adapter, 1* user manual. If you don't know how to use it, or if there is any problem with the product, you can contact us at any time, we will be happy to help you.