Feature 1WIRELESS CONNECTION: The mini printer can be connected to your smartphone via Bluetooth, allowing you to print photos and documents anytime, anywhere. 2CLEAR PRINTING RESULTS: Mini thermal printer has a print resolution of 200DPI for clear printing results. Can be used for students' wrong questions or photos. 3VERSATILE PRINTING OPTIONS: The printer supports thermal printing and black and white printing on 57x25mm, 57x28mm and 57x30mm paper sizes. 4LONG BATTERY LIFE: The pocket printer has a built in 1200mAh lithium battery that provides long lasting power for all your printing needs. 5LIGHTWEIGHT AND PORTABLE: The mini thermal printer is made of premium ABS material, compact, lightweight and easy to carry.Item Type: Mini Thermal PrinterMaterial: ABSConnection: BTAPP: For WalkPrintPrinting Parameter: 200DPIPrinting Method: Thermal No Ink, Black and White PrintingPrinting Paper: 57 x 25mm / 2.2 x 1in, 57 x 28mm / 2.2 x 1.1in, 57 x 30mm / 2.2 x 1.2in(one roll included, need to be purchased separately after use)Battery Type: Built in 1200mAh Lithium Battery .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Mini Thermal Printer1 x User Manual1 x Data Cable1 x Printing Paper (Built in)