Using digital storage and a 5 inch display Text and images can be displayed in a portrait or landscape format, and users interact with the device uses several buttons on the system that can turn pages, bookmark spots, or navigate menus. The device is capable of storing hundreds of books and files, always available to be read, in the same shape and weight as just one standard paperback book. This format is also more cost effective and environmentally friendly as there is no paper required, only power in the form of batteries. The Ectaco jetBook is compatible with Windows, Mac, and Linux, and is capable of several file formats, including ePub, Mobi, RTF, pdf, txt, and HTML. The device has a built-in rechargeable battery that can be powered via a USB connection with a host system, or an included AC adapter.