This M-Audio Hammer 88 MIDI keyboard controller doesn't come with a dedicated power supply, but it can be powered via USB. Note that the USB cable isn't included. There's glue on the top of the unit, and as shown in the photos, there's tape covering some damage on the left side.

Using this M - Audio Hammer 88 keyboard is easy. First, connect it to your computer via USB since it doesn't have a separate power supply. Once connected, it should be recognized by your MIDI - compatible software. When using, be careful around the left side where there's tape covering some damage. To keep it in good shape, clean it regularly with a soft, dry cloth. Avoid using harsh chemicals or getting it wet. Also, store it in a dry and cool place when not in use. This will help ensure its longevity and consistent performance.