Item Type: Inkless Pocket Printer Material: ABS Application: Fun Print Battery Type: Lithium Battery (Shipped With Built in Battery) Battery Model: 653040 Battery Capacity: 1000mAh Resolution: 200dpi Printing Method: Thermal Inkless Black And White Printing Connection Method: Bluetooth Connection Thermal Paper Size: Approx.57x30mm / 2.2 x 1.2in Product Size: Approx.8.2 x 8.2 x 3.9cm / 3.2 x 3.2 x 1.5in 1、Improve Learning Efficiency: Print and paste wrong questions for easy access, save time for hand copying notes, help learning, and improve learning efficiency. The wrong questions are no longer messy, and learning is organized.  2、Photo Search Questions: You can take photos to search questions in the APP, quickly get analytical answers, rich knowledge points, and massive question banks.  3、Multipurpose: Office notes, documents, work plans, memo lists, daily calendars, meeting notes, and recipe printing can all be easily done.  4、Mini Portable: The printer has a compact body design, delicate and compact, and powerful.  5、Inkless Printing: Long lasting battery life, no need to add ink, environmental protection and health, saving money and worry.