Features: 1. Mini size, double injection molding and rubber protection around, durable enough for anti-dropping 2. Non-slip design (salient points on the rubber of the two sides) 3. Exclusive power indication light 4. Support USB, power adapter or power bank charging 5. Standby mode to save power 6. Provide SDK for IOS and Android Product Parameters 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: 12Ã?24/ASCII Font B: 9Ã?17/Chinese: 24Ã?24 Characters per Line: Font A: 48/Font B: 64/Chinese: 24 Rolling paper Diameter: ï¿ 40(max)X80mm Paper feeding method: 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): 113Ã?103Ã?45(mm) Weight: 335g (including the paper roll and battery)