Mini UPS Uninterrupted Power Supply 20000mAh Lithium ion Backup Battery with ...
Each button is marked on it, which is very easy to use. Capacity: 20000mAh. Works great, easy to use, multiple power outputs. For example, it supports 1×5V/2A USB, 1×5V/2A DC, 1×9V DC, 2×12V DC output.