No Pro DJ Link on the 850s sadly. As Mitch said i think the usb control mode will work on some software (no idea which). Your best bet would be to stick with the USB's and just organise your drives well to maximise navigation, i can use rekordbox and different types of HID mode with my 900s i have at home but adding the computer was just alot of unnecessary setup and gear to travel with for me. Of course if you aren't playing out at different clubs it may be a different story for you, eg mobile where you need lots of genres and alot more music you may find usb impractical.