Portable BT Thermal Printer: Print Photos, Labels, and Study NotesPlease fully charge before use. Printing photos may not work well without sufficient power Olaf Portable Mini Printer Thermal Label Printer Sticker Inkless HD Pocket Printers For Phone Bluetooth Miniprint Printing PhotoProduct parameters:Printing parameters: 200DPIPrinting method: thermal inkless black and white printingBattery capacity: 1200 mA 3.7V power battery 2A chargingPrinting paper: 57X25mm, original printing paper needs to be purchased for easy replacementConnection method: Blue wireless inkless black and white printingLanguage specification: Simplified Chinese Traditional Chinese English Spanish Arabic Italian Japanese Korean German French Portuguese Russian Thai Vietnamese GreekFactory standard configuration: host+charging cable+manual+certificate of conformity+1 roll of printing paperAPP usage:Androidd downloads "Fun print"or "Iprint" in Google MarketIOS download "Fun print" or "Iprint"in the application market