Silvercrest RFH 1863 User Manual And Service Information page 18

SilverCrest Wireless Headphones RFH 1863
To toggle between conventional batteries and internal rechargeable battery
operation you must select the proper position with the function switch located
inside the left earpiece (see the detailed figure above).
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.
16 - English
Figure: Detailed view of the function switch