Sennheiser MM 450-X Instruction Manual page 10

Putting the MM 450-X into operation
Possibilities of charging the battery pack
First, connect the charging cable
section a and then connect the charging cable
described in section b.
a
Connecting the charging cable to the battery pack
a
You can charge the battery pack either inside or outside the headset. This
is helpful if you are using a spare battery pack (to be ordered separately).
To charge the battery pack
Open the cover of the battery pack compartment
Connect the charging cable
headset.
To charge the battery pack
Open the cover of the battery pack compartment
Press the button next to the battery pack compartment and remove
the battery pack.
Connect the charging cable
battery pack.
to the battery pack as described in
to a power source as
b
AU
EU
UK
US
inside the headset:
to the socket for charging cable
outside the headset:
to the socket for charging cable
on the left ear cup.
on the
on the left ear cup.
on the
MM 450-X | 9