1.With BT function, supports Android, IOS and Windows, convenient to print data from your device wirelessly. 2.Direct thermal printer, more quiet and fast working, saves energy. 3.Efficient and clear printing, print speed can reach to 80mm/s. 4.Built-in 1500mAh rechargeable lithium-ion battery, can work continuously up to 8 hours 5.Small size and , easy to carry.Designed for outdoor working, such as printing taxi bill, parking bill, express delivery invoice, restaurant ordering, ticket selling and so on. Print : Thermal line printing BT Version: 4.0 Battery:7.4V, 1500mAh Charging Time: 2-4 hours Standby Time: 100 hours Print Speed: 50-80mm/s Resolution: 203dpi ( 8dots/mm ) Paper Type: Thermal Paper Paper Thickness: 0.05 - 0.10mm Paper Width: 57mm +/- 0.5mm Print Width: 48mm +/- 0.5mm Rolling Paper Diameter: less than equal 40mm Barcode Type: -A, -E, -13, -8, CODE39, ITF25, CODEBAR, CODE93, CODE128, QR code, PDF417 Working Temperature: (-10-50) Storage Temperature: (-20-70) Supporting Image Formats: JPG, BMP, TIF, JPEG, etc. Supporting System: Android, IOS, Windows (through USB) Size:10 * 7.5 * 4.5cm Material:ABS Colour:blue Package Contents: 1 * Printer 1 * USB Cable 1 * User Manual (Chinese, English) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.