Pioneer Dj DDJ-FLX4 Portable 2-Channel rekordbox DJ and Serato Controller (Graphite) - Manual (Page 40)

Connections
40
En
 For a mobile device
(1) USB power adapter, mobile battery
(2) Mobile device
(3) Powered speakers, power amplifier, etc.
(4) Microphone
Front panel
(1) Headphones
DC 9V 3A