IK Multimedia iRig Keys 2 Mini 25-Mini-Key USB MIDI Keyboard Controller - Manual (Page 8)

English
7
6. To control an external MIDI device, use the included MIDI cable adapter and a standard MIDI cable (not
included) to connect the MIDI OUT port of the iRig Keys 2 to the MIDI IN port of the external device.
MIDI OUT
7. Connect your headphones or powered speakers to the Headphone Output jack on iRig Keys 2 and set its
level via the dedicated volume control.