Surface RT and Surface Pro have screens of 10.6 inches (27 cm) with a 16:9 aspect ratio. Surface RT has a 1366 by 768 display while the Surface Pro has a 1920 by 1080. Both tablets use Microsoft's ClearType HD display technology and support an ultra-wide viewing angle and auto-adjusting screen intensity. In announcement talk, Michael Angiulo said that when Surface Pro is held at 17 inches (43 cm), the eyes will not be able to distinguish between individual pixels. Both screens feature Gorilla Glass, scratch and crack-resistant glass.