The new ALVA 544 Satellite Traveler is the latest addition to the award-winning Satellite series of Refreshable Braille Displays from ALVA. ( http://www.aagi.com/catalogue/ProductVersion.asp?SerieSat). , , It's a mobile, 44-cell package that's ultra light and highly compatible, without compromising on performance quality or functionality. The Traveler is especially made for mobile users. Thanks to the state-of-the-art feature, enhanced navigation and highly productive operating possibilities, the ALVA 544 Traveler is a plug-and-play dream., , The slim, lightweight ALVA Satellite 544 Traveler sits perfectly under a laptop and is USB powered - perfect for those in need of refreshable braille while on the go.