Targus Chill Mat for Mac - AWE41US Versatile - Designed for optimal airflow and efficient positioning both on your lap or a desktop surface USB Powered - Connects and powers conveniently from your laptops USB port. Tilt Angle Design - Unique design features an ergonomically positioned tilt angle for comfortable use on both lap and desktop. Dual Fans - Two quietly powerful fans direct targeted cooling to Mac notebook hotspots revealed by detailed engineering design studies Soft Mesh Bottom - Breathable, soft mesh bottom facilitates air flow and keeps your lap comfortably cool.