I don’t know what your unit is.
Does it have an internal battery?.
Either way. It is a 5V power source. To power and/or charge your device or any other 5V USB device.
The device is standard type A, you can use USB A to any other type of connector. Nokia, iphone, samsung, torch, whatever requires 5V upto the max current. Older USB A were between 500mA and 1000mA. Some now are between 1A and 3A.
Martin