thomann Millenium MPS-750X User Manual page 24

Connections and controls
21 [EXT2]
Input for connecting an external trigger, second crash pad as standard.
22 [USB]
USB port for connecting a computer with USB-MIDI interface.
23 [DC 12V]
Connection socket for the power adapter.
24 [POWER]
Main switch to turn the device on and off.
24
e-drum module