Asus Transformer Book Trio official Pictures. Asus Transformer Book Trio is a Smartphone of asus. The Asus Transformer Book Trio Android Tablet. Announced Sep 2013. Features 11.6″ Display, Intel Atom Chipset, 5 MP Primary Camera, 1.2 MP Front Camera, 64 GB Storage, 2 GB RAM. Asus Transformer Book Trio price starts.