Features: brand new and high quality Save for time to copy notes by hand, help learning, improve learning efficiency, and print quickly. Support multiple functions, collect the exercises you have done wrong, fun and practical. 200DPI resolution, clear print quality. Built-in 1000mAh rechargeable battery, working in low noise, the thermal printer does not need ink cartridge when using. Mini cute design and lightweight body can be put in a pocket or bag for easy carrying. Can be used for work plans, memo lists, daily calendars, meeting notes,study, office, home and travel. etc. Specifications: Specification: Color: Blue, Pink (Optional) Battery: 1000mah Lithium Battery 7.4V Operate Power: DC5V, 1A Paper Type: Thermal Paper Connection: BT Connection Interface: Micro-USB Print Resolution: 200DPI Paper Size: 57X30mm/2.24X1.18in Printer Size: 80X80X35mm/3.1X3.1X1.4in Package Weight: 250g/0.55lb Package Includes: 1 x Thermal Printer 1 x Thermal Paper 1 x USB Cable 1 x User Guide note: How to Get the APP: Download the "IPrint" from the APP store. Please download the app before use and connect the device via app. Quick press the printer button twice, and it will automatically print out the paper with QR code. Scan it and quickly connect the device through BT. Then start printing! If the printing goes wrong, please check the installation of paper roll or contact us. Thank you! Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.