Silvercrest SWC 10 A1 Operation And Safety Notes page 6

Protection Class II
USB connection
Polarity of output terminal
"Qi" and the Qi logo mark are trademark of the
Wireless Power Consortium (WPC).
This symbol means that the operating instructions
must be observed before using the product.
CE mark indicates conformity with relevant EU
directives applicable for this product.
Short-circuit-proof safety isolating transformer
US Level VI efficiency
IP20
No protection against water
(SMPS) Switch mode power supply unit
GB/IE/NI
7