thomann Mellenium MPS-600 User Manual page 20

Operating elements
21 9 V
Socket for the connection of the power adapter for voltage supply.
22 POWER ON / OFF
Main switch to turn the unit on or off.
23 USB
USB port to connect a computer with USB MIDI interface.
MIDI IN / MIDI OUT
24
Connections for external MIDI devices.
25 Pad connection sockets.
26 Headphones output.
OUTPUT R / L/MONO
27
Stereo output for external audio systems and drum amps.
AUX IN
28
Stereo input for external audio devices like MP3 or CD players.
20
e-drum module