Microsoft Z3C-00022 Notebook Cooling Base - Red The efficient cooling channel directs heat away from your notebook and prevents overheating Contoured design for desk or lap use - just turn 90 degrees Built-in height adjustment provides added comfort, simply flip down the stand for desk use USB powered - No AC power needed, while the single fan design consumes less power Lightweight and compact - Works here, there and everywhere Cable management clip Dimensions: 11.4" x 11.4"