Using the Dymo M2 Digital Scale is easy. Just weigh envelopes and packages up to 2kg and read the result off the large and clear LCD screen accurate down to just 1g (0.04 oz). Use the tare function to automatically subtract the weight of a container or bag, or the hold button to freeze the weight on the screen after removing the package. Featuring automatic switch off, the unit can be powered by USB (included) or batteries (not included).