Printing Method: Direct Thermal Printing (no ink, no toner) Connectivity: Bluetooth | Size: 3.5*11.*2.3 inch Weight: 800gm | Color: Black Compatible System: iOS & Android 304dpi high resolution printing head and print at a speed of 50mm/s, clear print and stable performance. Support multiple functions, it can print photos, labels, messages, lists, records, QR Code, web printing and so on. The APP offers a variety of fonts and themes to make your photos stylish. Built-in 2600mAh rechargeable batterys, working in low noise, the thermal printer does not need ink cartridge when using, low operation cost. Record your life, print the scenery you see, record his or her sweet words. Lightweight and compact size, easy to carry.