Dymo MobileLabeler User Manual page 8

 Unplug the power cord immediately if you notice any abnormal odor, heat,
smoke, discoloration, deformation, or anything unusual while the label maker
is in use.
DYMO D1 Label Cassettes
 Use only DYMO-branded D1 label cassettes in this label maker.
 Do not use any unauthorized accessories or supplies.
 Clean the surface before applying the adhesive label or the label may not
adhere correctly and could peel off easily.
 Do not expose the labels to extreme heat or sunlight.
3 DYMO MobileLabeler
User Guide