Connectivity:Technology Bluetooth Printing Technology:Thermal Special Feature:Portable, Scan To E-Mail Printer Output Type: Monochrome Direct Thermal Printing Label Width: 0.23inch, 0.47inch, 0.55inch, 0.59inch (6mm12mm14mm15mm) Data Transfer: Bluetooth 4.0 Wireless Distance: 10m Quick access to fonts, frames, symbols, and more Prints up to 3-lines on labels up to 15 millimeters wide30+ fonts, 60 frames, and more than 1600 symbols Please note that: 1. Download the app "Print Master" from the apple store/google play 2. connect the Bluetooth via the "Print Master" app, not on the phone system 3. Before printing, please choose the right size for the printing paper on the app, the size of the label tape comes with is 12x40mm