Features: 58mm portable thermal receipt printer, strong compatibility, support BT function or USB cable connection, compatible with Windows 7/10, Android, iOS system. Please download relative APP (For Android system, support caysnprinter Loyverse, BT Print, Kyte, RawBT; For iOS system, support POS-printer, Kyte, Kahero POS, Utak.) or driver on your devices. Compatible ESC/POS print commands. Clearly Print: 203dpi resolution, support max. 40mm roll diameter, reduce paper change times. Easy to load paper. 57±0.5mm paper width, 48mm effective print width, 90mm/s max.print speed, high efficiency and clear printing. Save Your Money: Direct thermal printing, no ink cartridge, environmental protection and money saving. Compared with dot matrix printer, it is smaller and quieter. Handheld and Portable: Portable and lightweight, easy to carry, it doesn't need much space. Widely used in bill printing, post receipt printing, restaurant ordering information printing, shop receipt printing and so on. Long Service Life: The built-in 2500mAh rechargeable lithium battery has long standby time and can print continuously for 1 hour with one full charge. Wireless connection, print anytime and anywhere. Specification: Model: H20 Printing method: line thermal printing Printing dots: 384 dots/line Dot density: 8 dots/mm Printing speed: maximum printing speed 90mm/s Print width: 48mm Paper output direction: top output Interface: USB，BT Paper Width: 58mm(57.5+/-0.5mm) Paper Thickness: 0.048mm-0.08mm Max Roll Diameter: ≤42mm Battery capacity: 2500mA Charging standard: 5V / 1A Battery voltage: 3.6V~4.2V Bt connection distance: ≥55m (open area) Appearance Size: 85.5(W)*118(D)*47(H)mm Net weight: 190g Package Size: 16x12.3x5cm/6.2x4.8x2in Package Weight: 310g/10.9oz Note: Please download the driver before connect the printer with the computer: http://www.donnwei.com/?p=33808 Packing List: 1 x Thermal Printer 1 x Thermal Paper Roll 1 x Charging Cable 1 x User Manual