Printing way: Thermal Line printing Paper width: 80mm Printing width: 72 mm Resolution: 203dpi(8 dot/mm) Printing speed: 75 mm/s (max) Dot /line: 576 dots/line Print Font ASCII Font A: 12×24/ASCII Font B: 9×17/Chinese: 24×24 Characters per Line Font A: 48/Font B: 64/Chinese: 24 Rolling paper Diam eter: ￠40(max)X80mm Paper feeding meth od: Easy paper loading Barcode type: CODE39/EAN-13/EAN-8/CODABAR/CODE93/ITF /QR/PDF417 MCBF: 5 Million Lines Print head lifespan: 50 km Interface: Bluetooth(BT4.0&BLE)/WiFi/USB/RS232 Paper out alarm: Support Printing Command : ESC/POS Battery: 2000 mAh rechargeable li-ion battery lifespan is more than 500 times Continuously working for 3 hours or 100m 4-6 hours charging time Power Supply: USB/Power adapter/mobile power charging Power alarm: Battery need to be charged or changed when battery light turns off and red light turns on Dimension(LxWxH)： 113×103×45(mm) Weight: 335g (including the paper roll and battery) Environment para meters: Working temperature: -10℃～ 50℃ Working humidity: 20% ～ 85% Storing temperature : -20℃ ～ 70℃ Storing humidity: 5% ～ 95%