The Sabrent USB-Powered Notebook Cooler keeps your notebook cool. It features a large 230mm fan for maximum thermal heat dissipation, keeping your notebook from getting too hot. The fan quietly whirs the heat away from your laptop at a rate of 600 RPM, producing almost 60 CFM of airflow. Hot air is sucked in from the bottom of the laptop and exhausted through the bottom. It is powered by connecting to a single USB port, plus an Power LED.