Product parameters: Printing parameters: 200DPI Printing mode: thermal-free black and white printing Battery capacity: 1200mA 3.7V Lithium battery 2A charge Printing paper: 57X25mm, original printing paper must be purchased for easy replacement Connection Mode: Bluetooth wireless, inkless, black and white printing Language Specification: The current version of APP supports these Languages: English, French, Italian, Spanish, German, Greek, Russian, Chinese. Factory default configuration: host+charging line+manual+1 roll of printing paper APP usage: Androidd download Fun print or Iprint from Google Market IOS download Fun print or Iprint from application market Android version supports Android 4.0 and higher, and it is recommended to use version 5.0 and higher of the system; the IOS version supports IOS 10.0 and above, and it is recommended to use system version 11.0 and above