Vivitar Laptop Cooling Pad USB Powered to 17" Vivitar helps prevent Overheating of your valuable equipment by adding a cushioned layer of airflow between laptop and your lap Special contoured design Maximizes airflow between the the base of your laptop and the cooling station providing essential airflow needed for cooling particularly during extended periods of use Ergonomic designs elevates your device and increases viewing angle Powers from your USB Port Windows or Mac and requires no other batteries to operate