Features: A4 Portable Printer: Small and lightweight, easy to carry, print anytime and anywhere. 300 dpi resolution, advanced thermal transfer technology, clear handwriting and good printing effect. Wireless Connection: Support BT wireless connection with Smartphone APP(Poooli), compatible with Android and iOS system. Connecting with computer via USB cable is also supported. Automatic Paper Suction: When printing, as long as A4 paper is put into the printing port, the printer will automatically suck the paper, and there is no need to open the printer cover. Long Endurance: Built-in 2000mAh lithium battery, once full charge can print up to 70 sheets of A4 paper(one side). Type-C fast charging interface can greatly shorten the charging time. Wide Application: A4 mobile printer, ideal for printing PDF file, test paper, webpage, contract, photo, picture, etc. an excellent assistant for study and office work.