Item Type: Mini Printer Material: ABS Battery: Lithium Battery 1000MAH (Ship with Inbuilt Battery) Charging: 5V, Micro USB Printing Specifications: 200dpi Paper Specifications: Approx. 57 x 30mm / 2.2 x 1.2in Connection Method: BT 4.0 or Higher System: Support for Android, for Apple Use Time: More Than 8 Hours 1、[Multifunction] Supports wireless BT 0 connected with smartphones. Support a variety of functions, can print photos, labels, information, lists, records, wrong questions, web page printing, etc.  2、[Low Noise] Inbuilt 1000mAh rechargeable battery, low working noise, no need for ink cartridges when using thermal printer, low running cost. 200DPI resolution, good printing quality.  3、[Environmental Protection] Compact and light body, you can put it in your pocket or bag and carry it with you. Using advanced thermal printing technology, no ink cartridges or consumables are needed. High quality print head with long service life and good printing quality.  4、[Wrong Question Set] Handwritten notes save time, help study, improve learning efficiency, printing speed 10mm/s, wrong questions are no longer messy, very suitable for students.  5、[Practical Gift] The mini printer looks cute. You can give this printer as a gift to your children to help them learn, or you can give it to office workers, lovers, friends, and family.