It's easy to use. Just download the application: iPrint and open the Bluetooth connection. Features: Bluetooth 4.0 connection, the phone connects to the cloud for printing through the App. Memo, record, message, friend sharing. Super small size, easy to storage it in your handbag. Strong compatibility, suitable for various brand of phones. The user see all the content information on the phone screen can be print instantly. Descriptions: 1000mAh rechargeable lithium-ion battery, continuously working for 24 hours, 1.5 hours charging time and 1 week standby time •100% Genuine •No Ink •Great Mobility •Bluetooth V4.0 •Built-in Battery: 1000mAh (Can print 40 meters of paper length when fully charged) •Printing: Thermal Printer •Paper Width: 57mm •Printing Width: 25mm •Printing Speed: 14.04mm/s •Recharging: Micro USB •Temperature: 0~50ºC •Compatible: iOS/Android •Application: iPrint •Size: 8.3x8.3x4.5cm(Product), 12.3x10.6x5cm(Packaging) •Weight: 160g(Net), 240g(Gross) •Package Included:1 Printer, Micro USB Cable, 1 Roll Thermal Paper, Manual DQ-DYJ003DL