Pioneer HDJ-CUE1 Bluetooth DJ Headphones (Matte Red) - Manual (Page 13)

13
Operating methods
Other functions
Reset
If you become unable to use the device, you can reset the headphones.
1 Press the multifunction button and “+” volume button
simultaneously for at least five seconds while the power is on.
All previous operations will be reset. (Information on registered devices will also be
deleted.) After resetting, power is turned off.