Phomemo portable printer m832 is a compact, wireless, inkless portable thermal printer.Resolution: 300 x 300 DPI,Technology: Direct thermal printing (no ink or toner needed, uses thermal paper),Connectivity: Bluetooth (for iOS/Android via the Phomemo app) and USB (for Windows/Mac with drivers,Battery: 2,600 mAh rechargeable lithium battery (prints up to 140–150 pages per charge, up to 6 months standby),Paper Sizes Supported: A4, US Letter (8.5" x 11"), and smaller widths (110mm, 80mm, 53mm rolls or folded paper).