Operating System:iOS, AndroidAre Batteries Included:YesLithium Battery Packaging:Batteries contained in equipment Thermal label printer - no ink, toner or ribbon required. This means that you only need to install the label to print. The M221 label printer is equipped with 100pcs 40x30mm white labels.Get larger labels - Compared with a similar 2-inch thermal label printer, the M221 label printer can print a wider paper: 0.79 "- 3.15" (20 mm to 80 mm). Show your customers clearer words, pictures, etc.Applicable to Smartphones and PC- Memoking M221 bluetooth label printer is 100% compatible with IOS and Android phones, and also supports the use of USB to connect MAC and Windows.Rechargeable, ultra-long working time- 2200 mAh battery can continuously print 36 rolls of labels, only takes 1.5 hours to fully charge. Save a lot of time, so you can focus more on your business.Secure APP - After downloading the "Print master" application, log in directly as a tourist and the app will not steal any personal information. With the functions of printing text, image, barcode and QR code, you can freely edit the label suitable for your industry.