Features: 1.Exquisite and lightweight structure, easy to carry, with for Bluetooth host function 2.Low noise and high speed printing, equipped with large capacity rechargeable lithium battery 7.4V, 2280mAh 3.Support client local program upgrade 4.Equipped with for Windows computer side driver 5.Can be used for 5-7 days after being full charged. The indicator light will be on when charging, and the indicator light will be off after charging. specification:Item Type: Thermal Label Printer Printing Method: Hot line printing Effective Printing Width: Approx. 78mm / 3.1in Density is 8 / mm, 384 points / line Printed Characters: ANK: 8 X 12, 16 X 24 GBK: 16 x 24, 24 x 24 Characters Per Line ANK: 48,32 GBK: 24,16 Paper Type: Thermal label paper Paper Width: Approx. 80mm / 3.1in Roll Diameter: Approx. 40mm / 1.6in Roll core diameter 15mm (minimum) Paper Thickness: 0.12mm Print Head Life: 50 km Barcode 1-D: UPC-A, UPC-E, EAN-13, EAN-8, CODE39, ITF25, CODABAR, CODE93, CODE128 2-D: QR code Instruction Set: ESC / POS Power Supply: AC100-240V / 1.0A Working Temperature: -10-50 Storage Temperature: -20-70 Working Humidity: 20-85% Storage Humidity: 5-95% Model: MTP-3 Print Speed: 100mm / s PackageList:1 x Printer1 x Label Paper1 x Compact Disc1 x Plug1 x USB Cable1 x User Manual