Print Method : Support Wireless BT 4.0 connected with smartphone and USB cable connected with PC. Please follow the user guide to download relative APP(PeriPage)/driver on your devices. Printing All You Like : Support print photos, labels, messages, lists, OCR text recognition, AR picture, wrong questions, web printing and so on. The APP offers a variety of fonts and themes to make your photos stylish, fun and practical. Power Bank Function : Built-in 2800mAh lithium battery, with a charging adapter, support charging for your smartphone, night light and small fan, etc. Working in low noise, the thermal printer does not need ink cartridge when using, low operation cost. Creative Note Clip : Advanced silica gel material, skin feel surface treatment, with magnetic absorption design, it can also be disassembled. Thermal Paper Specs : Printer with high quality print head, can print 57mm(width)x40mm(roll diameter) thermal paper, 203DPI resolution, good printing quality.