The ALVA 544 Satellite is part of the award-winning Satellite series of Refreshable Braille Displays from ALVA. ( http://www.aagi.com/catalogue/ProductVersion.asp?SerieSat). , , It is a 44-cell Refreshable Braille Display package that's ultra light and highly compatible. It combines versatility with an enhanced ergonomic design. Utilizing both Double Touch Cursors and the new Satellite Key Pads, the ALVA Satellite offers complete access to even the most complex applications.