The type label on the device contains the information as shown in the drawing below
(example taken from CYCLE 407 MED):
Appendix
Technical and optical modifications as well as misprints reserved -
© 2011
by ERGO-FIT GmbH & Co. KG
6 4
Mains supply values
Fuse model
Type B
CE mark (for medical devices with
notified body CE 0297)