Features:   Mini BT thermal receipt printer, 58mm paper width, 48mm print width, 50-80mm/s print speed, 203dpi resolution.   Support BT and USB cable connection, compatible for iOS, Android, Windows system. Please download relative APP or driver on your devices.   Adopting thermal print head, no need ink cartridges or ribbons, clear printing, low operation cost, thermal paper is easy to buy.   Built-in 1500mAh large-capacity rechargeable lithium battery, about 4 hours charging time, about 4-5 hours continuous working time, print receipts at any time.   Portable and lightweight, easy to carry, it doesn't need much space. Widely used in bill printing, post receipt printing, restaurant ordering information printing, shop receipt printing and so on.   Specifications:   Color: Black   Material: Plastic   Print Method: Line Thermal Printer   Print Paper Width: 57mm±0.5mm   Printing Width: 48mm   Resolution: 8dots/mm(203dpi)   Print Density: 384 dot/line   Print Speed: 50-80mm/s   Roll Diameter: 40mm(max.)   Printing Characters: ANK: 8x16,9x17,9x24,12x24   GBK: 24x24   Characters/Line: ANK: 48,42,32   GBK:24,16   Life Cycle Time: 50km(printing density under 12.5%)/100 million pulses   Barcode Type:   1D: PC-A,UPC-E,EAN-13,EAN-8,CODE39,CODE93,CODE128,CODABAR,ITF25   2D: QR CODE,PDF417   Interface: BT/USB   Paper Feeding: Easy Paper Loading   Paper Cut: By Hands   Print Command: Compatible with ESC/POS   Built-in Lithium Battery: 1500mAh/7.4V   Charging Time: About 4 hours   Operating System: Compatible for Android, iOS, Windows   Working Temperature: -10 ~50   Working Humidity: 20%~85%   Storage Temperature: 15~20   Storage Humidity: 45%~75%   Item Size: 7.8 * 10.5 * 4.7cm / 3.1 * 4.1 * 1.9in   Item Weight: 221g / 7.8oz   Package Size: 15.3 * 12.6 * 6.8cm / 6.0 * 5.0 * 2.7in   Package Weight: 350g / 12.3oz   Packing List:   1 * Printer   1 * USB Cable   1 * Thermal Paper Roll   1 * User Manual(English)