Operation - AKG HEARO 888 TITAN User Instructions

Check that the AC voltage stated on the AC adapter is the same as that
available in your country.
Therefore, charge the supplied batteries before first operating
your headphones system.
If you operate the headphones on dry batteries, never try to charge the
batteries using the transmitter's charging feature. This would cause serious
damage to your headphone system. Dispose of spent batteries conforming to
local waste disposal rules.
3 Audio and Power Connections
Important:
3.2 Connecting the
Transmitter to AC Power

4 Operation

4.1 Charging the Batteries
in the Headphones
WARNING:
Important:
4.2 Replacing Batteries