1.Convenient for Your Life: With compact size 290 x 90 x 60 mm, great for carry to business travel, school etc. It can be edited and printed in your mobile. An independently developed App provides plenty of templates, patterns and icon materials for editing files, pictures, posters, lists, etc. 2.All in One Printer: Perfect for printing anything such as PDF files, test papers, webpages, contracts, photos, pictures, etc. Wireless printing allows for printing a large number of papers during business trips. It is an excellent assistant for study and office work. Inkless printing without ribbon. 3.A4 Printing Size: Capable of printing 56mm/77mm/107mm/210mm/216mm(2in/3in/4in/8in/8.5in) and US letter thermal paper. Ideal for printing documents, daily plans, memos, etc. Comes with a roll of thermal paper, ready to print as soon as you receive the product, no need to buy extra printing consumables. 4.Powerful : Built in 1500mAh large capacity lithium battery, can print 200 sheets of A4 paper after a full charge; Each paper roll can print 45 sheets of A4, reducing the need for frequent replacement.