The thermal label printer support printing via Bluethooth. Download the “Shipping Printer Pro” app from Google Play or Apple Store to print via Bluethooth for iOS and Android. For Windows 7, Mac with M1 or M2 CPUs can also install the APP to print via Bluethooth on SWIFINT shipping label printer. USB connection works with Windows (7 and later), Mac OS, Chrome OS. Please notice that Mac OS ONLY works with USB connection, you can not print via Bluetooth.