Model: RS-V55 Touching function: supporting 10 points touching supporting pictures amplification,shrinking and rotation. supporting all signal sources and using touching functions. supporting on controlling all singals.voices or other list control by using touching function Specifications: CPU: Coretex A7 Quad Core 1.5Ghz System: Android input system Memory: DDR3 1G--4G Memory Room: 4GB--16G HDD: 500GB--2T Display Spec. Display dimension: 98" inch (16:9),86" inch,75"inch, 55"inch Displayer screen :LED Screen Viewable Areas: 2182.8mmX1240.8mm Resolution: 3840 x 2160 pixels Displaying colors: 10bit,1.06B Brightness: 500 cd/ã?¡(typ.) Contrast ratio: 1300:1 (typ.) Viewing angle: 178 degree (H) / 178 degree (V) Lifetime for backlight: 80,000 hrs (min.) Screen protecting: 5mm Tempered Anti Glare Glass