Sennheiser XS Wireless Instruction Manual page 45

Charging the rechargeable battery
To minimize charging time and allow you to monitor the charge level, you
should switch off the transmitter before charging the battery.
However, the transmitter can also be charged while in operation.
►
▷ Use the charging cable to connect the USB port on the transmitter to
the USB port on the receiver.
The status LED indicates the charge level.
< 5 %
5 % – 75 %
> 75 %
100 %
Using stickers to label transmission paths
You can use the colored stickers to show which transmitter belongs to
which receiver.
►
Operation
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