Product Review - ASUS Transformer Book Duet Notebook-maker ASUS Asus, one of the leading Notebook manufacturer, presents another milestone, the ASUS Transformer Book Duet which also the world's first quad-mode, dual OS laptop and tablet convertible equipped with a 13.3-inch Full HD IPS touchscreen display, a dominant Intel Core i7 processor, 4GB RAM and 128GB storage capacity.