Features: Save for time to copy notes by hand, help learning, improve learning efficiency, and print quickly. Small and lightweight, easy to carry. 57mm paper width, 203dpi resolution, smooth and clear print, meet your various printing needs The lovely appearance design is a good partner to improve learning efficiency and record the wonderful momentsof life. The printer adopts thermal printingmethod, which is fast, low noise, clear printing, inkless, and environmentally friendly. Specifications: Model Number: Paperangp1 Pocket Printer Color: White/Green/Pink Paper Type: Thermal Paper Material: ABS Printing Method: Thermal Printing Connection: BT-compatible Connection 4.0 Resolution: 203dpi Paper Width: 57mm Roll Diameter: 30mm Input Voltage: for DC5V, 2A Battery: Built-in 7.4V, 1000mAh LithiumBattery System Supported: AndroidsiOS, for Windows and more Paper Size: approx 83x83x45mm/3.27x3.27x1.77in Item Weight: 160g/ 5.6oz Package Weight: 297g/0.65lb Package Includes: 1 x Thermal Printer 1 x Thermal Paper 1 x USB Cable 1 x User Guide note: 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.