Specifications include, but are not limited to: 99 each Interactive Flat Panel Displays AP9-B75-NA-1 Promethean 75” ActivPanel 9 Premium (only) DISPLAY Screen Size and Resolution: 75" 4K Screen Type TFT LCD (Direct LED Backlight) Blue Light Reduction Yes Bonded Glass Yes Aspect Ratio 16:9 Display Area 75" 4K: 1652 x 930 mm (65 x 36.6 in) LCD Viewing Angle 178° LCD Response Time 8 ms LCD Refresh Rate (Panel) 60 Hz LED Lifespan 50,000 hours Contrast Ratio 5000:1 Dynamic 1200:1 Static Brightness 400 cd/m2 Ambient Light Sensor Yes Glass Hardness 9H (pencil), 7 (Mohs) Glass Type Heat tempered, Anti-Glare INTERACTIVITY Vellum Touch Technology Yes Continuous Touch Points 20 Touch Resolution 32768 x 32768 px Response Time ≤5 ms Touch Accuracy 1 mm Tracking Rate 4 m/s Scan Rate 200 Hz Gestures and Edge Swipes Windows® supported. Eraser Included (Block Eraser) Yes Unique Pen IDs 2 Pen and Touch Differentiation Yes Palm Erase Yes Palm Rejection Yes, writing and non-writing hand Pens Included Yes, 4