Can run on 9 V power supply or 3 AA batteries (included)

yellow and pink

and this helps to make the sound can be played loud without distortion

Shure Batterilader til SB904 (GLXD+)

The device is cooled by cooling fan

OMNITRONIC PAD-12 MIDI Controller SC-Sound Can run on 9 VOmnitronic PAD 12 MIDI controller Compatible with all common MIDI software 12 illuminated touch sensitive pads, 6 transport buttons 4 programmable memory banks 2 assignable buttons OMNITRONIC PAD 12 MIDI Controller Omnitronic PAD 12 MIDI controller for musicians, producers and DJs. The PAD 12 MIDI controller can be used with any MIDI software, but Omnitronic Editor is included. Compact and easily transportable. 12 illuminated touch sensitive pads. 6