Specification Thermal sensitive line dot method 56mm 60 ~ 80μm 48mm 8 dot/mm(230 dpi) 384 dots 50-80 mm/s Support any language 103 x 75 x 46 mm 340g ≤30.5mm Original IR(RAW_IR), VIR, IrDA (IrCOMM) RS232 port, Bluetooth, USB interfaces varied between different models. Working temperature: -10⁰C ～ 50⁰C Working humidity: 20% ～ 85% Storing temperature : -20⁰C ～ 70⁰C Storing humidity: 5% ～ 95% Easy paper loading detecting mark position An LED indicator flashes when the paper runs out, and an alarm sounds. ESC/POS compatible with commands set 1600 mAh rechargeable li-ion battery When the battery is low, the indicator flashes and the printer gives two short hoots. The buzzer will also sound repeatedly to indicate charging time. Print Way Paper Width Printing thickness Valid printing width Resolution Dot/Line Printing Speed Printing content Outer dimension Weight Rolling paper Diameter Interface Environment Parameters Paper feeding method Mark position Paper sensor Printing Command Power Power alarm