1,Support USB wired and BT wireless connection, can be printed at a distance, more convenient to use. 2,Thermal printing technology, no ink cartridge/carbon ribbon required, saves the cost of expensive consumables, clear printing. 3,80mm paper width, 72mm effective printing width, support 384 dot/line printing density. 4,Portable handheld printer, small and lightweight, easy to carry. 5,Built in 3600mAh li battery, long endurance time. 6,Widely used in supermarket, restaurant, retail store, warehouse, parking lot, etc. Specification: Printing method: Thermal line printing Print command: ESC/POS Print width: 72mm Character size: 24 x 24 point Print density: 384 dots/line Print speed: Maximum 90mm/s Interface: USBandBT Paper width: 79.5 0.5mm Mechanical properties: 50KM Roll diameter: 50mm Operating System: Compatible with for Android, for Win Built-in li battery: 3600mAh(1800mAh x 2) Code Type: 1D: UPC_A/JSN13(EAN13)/JAN8(EAN8)/CODE39/ITF/CODABAR/CODE93/CODE128, 2D: QR code Item size: 12.5 x 11 x 5cm /4.92 x 4.33 x 1.97in 1 x Printer 1 x USB cable 3 x Roll of paper(1 roll has been installed in the printer) 1 x Power adapter 1 x Protective case 1 x User manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.