Silvercrest SWED 250 A1 - Manual (Page 110)

SilverCrest SWED 250 A1
108 - English
Prior to use
You can use the device either with the enclosed batteries of type AA
(Mignon) or with an optional mains adapter (not supplied). Ensure correct
polarity when using batteries! The mains adapter must have a suitable DC
voltage plug and have an operating voltage of 5V.
Do not use both operating options at the same time.
Remove the batteries before you connect the device with
the mains adapter because the batteries may leak when
not in use.