Sennheiser evolution wireless series EM 100 - Manual (Page 46)

Cleaning the receiver
45
Cleaning the receiver
̈
Before cleaning, disconnect the receiver from the mains.
̈
Use a cloth to clean the receiver from time to time. Do not use any
solvents or cleansing agents.
CAUTION! Liquids can damage the electronics of the receiver!
Liquids entering the housing of the receiver can cause a short-circuit and
damage the electronics.
̈
Keep all liquids away from the receiver.