I tested these things with this headset:

- Power on/off (to power on/off you simply turn both earcup to a normal wearing position (on); rotate and fold the earcups inward so that they are laying completely flat (off). 

- Volume up/down - swipe up/down right ear cup, it is touchpad.

- Play/pause - tap on right ear cup. 

- Next/previous track - swipe forward/back on the right ear cup

- Active Nose Cancelation (ANC)

- USB cable connection

- 3.5mm cable connection

- Bluetooth connection - was able to succesffully conenct to my Android phone and Windows laptop. You can directly connect to the Bluetooth enabled phone or laptop, no dongle needed.

Battery appears to be in great shape - during my testing, I played music over BT for 45 minutes, and after that EPOS Connect app still showed 100% battery status.

Upgraded to the latest available firmware.