Silvercrest SFR 2.4 A1 - Manual (Page 45)

SilverCrest SFR 2.4 A1
The ear cushion is fixed on a plastic frame. You need to
remove this frame from the locking mechanism together with
the ear cushion. Do not pull on the ear cushion itself.
3. Insert two AAA batteries into the earpiece battery compartment. Make
sure you match the correct polarity. Note the + and – icons on the
batteries and inside the battery compartments.
4. Slide the function switch (10) to the “DC2” position to switch to battery
mode.
5. Place the ear cushion onto the earpiece so that the locking noses of the
plastic frame are inserted into the corresponding notches on the
earpiece. Then turn the ear pad carefully counter-clockwise until it clicks
into place.
To switch between conventional batteries and internal rechargeable battery
operation you must select the proper position with the function switch (10).
• Position "DC1" represents internal rechargeable battery operation
• Position "DC2" represents conventional battery operation
Pay attention to the proper setting of the function switch. If
no batteries are inserted and you have left the function
switch at the “DC2” position, the headphones will not power
on.