Sennheiser D 10 series Instruction Manual page 31

Charging the headset and storing the headset system
Charging the headset using the optional CH 10 headset charger
The CH 10 headset charger is an optional accessory available from your
Sennheiser partner. The CH 10 allows you to charge additional D 10 series
headsets, e.g. for sharing the same base station when working shifts.
Refer to the instruction manual of the CH 10 for more information.
Charging several headsets simultaneously
The MCH 7 multi USB power source is an optional accessory available from
your Sennheiser partner. Together with the CH 10 USB, the MCH 7 allows
you to charge up to 7 headsets simultaneously.
MCH 7
Refer to the instruction manual of the MCH 7 for more information.
CH 10 USB
D 10 series | 30