... to enhance the life of the machine; High speed core processors, high performance printer machine, software process and algorithm ... wayBluetooth printerEffective print paper width48mmPrinting paper57.5±0.5mmPrinter core life50KM(25% print density or less)100million ... paper loadingPower supply7.4V, two 1400mAH lion battery packPrinters core life50km (25% print density or less)Charging InterfaceDC12V, ...