Something incongruous for a USB product, there is a battery! I guess that's a need for power to print.
The app is provided quite okay for home use. For printing barcodes and other advanced functions, there is a downloadable software that works perfectly on Windows 8.1 (qu'envahissant well, it installs a service, add-ins Office, a print driver ... ).
I would have preferred a wider tape supplied original, but I nitpick ...