When I connect to DDJ-200 with Bluetooth and press the Headphones CUE buttons (channel)/(master), there is no sound from the DDJ-200 headphones.

When you are connected to DDJ-200 with Bluetooth and you want to use the Headphones CUE buttons (channel)/(master), enable Split Output with the following steps:
- Connect the split cable supplied with the DDJ-200 to the mobile device.
- Connect the L side of the split cables to the speaker, and the R side to the headphones, as shown in the figure below.
- Open the rekordbox for iOS/Android settings. Under Audio, turn on Split Output.

(1) Speaker with built-in amplifier, etc.
(2) Headphones
(3) Plug for the speaker with built-in amplifier, etc.
(4) Plug for the headphones
(5) Split cable
(6) USB/Lightning to 3.5 mm headphones jack (not supplied)