Label unwinder UW-4L is designed for unwinding the labels as the printer feeds it. The method of unwinding labels externally offers advantages in case you want to have control of the label roll or you want to use bigger label rolls than the printer can contain.
The "Heavy duty" Unwinder (UW-L serie) models are made in 4 different models. Different models can take label
width size 110mm or 180mm, and label roll diameter size 240mm or 360mm.
If you are looking for a small or medium size Unwinder you should look at
UW-2S, UW-4S or UW-6S depending on the width of your labels.