Wacom Cintiq 24HD, Cintiq. Connectivity technology: Wired, Device interface: USB, Aspect ratio: 16:10. Accuracy pen: 0.5 mm. Display: LCD, Contrast ratio (typical): 550:1, Brightness: 190 cd/m². Mac operating systems supported: Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion. Input voltage: 100 - 240 V, Input frequency: 50/60 Hz, Power consumption (typical): 71 W