ASUS ZenScreen MB166B Portable USB Monitor- 15.6 inch Full HD, IPS, aspect ratio: 16:9, Viewing Angle (CR≧10, H/V) : 178°/ 178°, Brightness (Typ.) : 250cd/cm2, Contrast Ratio (Typ.) : 1000:1, Display Colors : 262K, Response Time : 25ms(Tr+Tf), Refresh Ra