1Support BT 4.0 function, support for Android for iOS for Windows, convenient for data in your wireless printing device 2High efficiency, print speed can get to 50 to 80mm/s, clear print automatic sleep, automatic wake up, power saving 3Built in 1500mAh large capacity charging lithium battery, long time work, support smartphone control, easy operation, improve work efficiency 4The direct thermal printer prints with thermal paper, the volume is smaller, more quiet, faster, energy efficiency 5Taxi ticket printing, management fee receipt printing, receipt printing, restaurant order information printing and other small light, easy to go out Item Type:ThermalPrinterModel: D58A-2BTVersion: 4.0Interface: Micro USBPrinting Method: Thermal PrintingPrint Speed: 50 to 80mm/sDistance: 8dots/mm, 384dots/linePrinting Width: Approx. 48mm/1.9inPaper Width: 57.5 0.5mnVolume Outer Diameter: Approx. 40mm/1.6inCascade Inner Diameter: Approx. 13mm/0.5inPaper Thickness: 60 to 80umLife Cycle Time: 50km(Print Density is Below 12.5%)Input Voltage Current: AC 100 to 240V ~ 0.2A 50 / 60HzOutput Voltage Current: DC 5V / 1000mABattery Type: Charging Lithium Battery (Built In)Battery Capacity: 1500mAh 1 xThermalPrinter1 x Data Cable1 x Plug1 x User Manual 1. If the printer is not used for a long time, the battery must be removed, otherwise the battery and printer will be damaged.2. Please select a high amount of paper. Do not store the thermal paper in a high temperature and sun irradiation area.3. ped with built in battery.