The MacBook Air is a full-size 3.0 pound notebook encased in 0.16 to 0.76 inch of sleek, sturdy anodized aluminum. The 13.3-inch, widescreen LED backlit display is mercury- and arsenic-free, making it more power efficient. The keyboard is full-size and has backlit key illumination with a built-in ambient light sensor to automatically adjust keyboard and display brightness for optimal visibility. MacBook Air also includes a built-in iSight camera and an oversized trackpad with multi-touch technology.