Specifications: Screen size: 27 inches (diagonal viewable) Screen type: TFT active-matrix LCD with in-plane switching (IPS) Resolution: 2560 by 1440 pixels Colors: 16.7million Aspect ratio: 16:9 Viewing angle: 178° horizontal; 178° vertical Brightness: 375 cd/m2 Contrast ratio: 1000:1 Response time: 12 ms Built-in Thunderbolt cable Built-in Universal MagSafe cable (up to 85W) Ports: Three poweredUSB 2.0 ports; FireWire 800 port; Gigabit Ethernet port; Thunderbolt port; Kensington security slot Built-in FaceTime HD camera with microphone Built-in 2.1 speaker system (49 watts) Input voltage: 100V to 240V AC; 50-60Hz Height: 19.35 inches (49.1 cm) Width: 25.7 inches (65 cm) Depth (with stand): 8.15 inches (20.7 cm) Weight: 23.5 pounds (10.8 kg) Compatible with VESA Mount Adapter Kit (sold separately)