The EMX-AC-0391 is an air cooler from EMAX that is designed for cooling small to medium sized electronic devices. It features a fan speed of up to 1600 RPM, a fan diameter of 92mm, a counterclockwise air flow, and 4-pin PWM connector. The air cooler features a four-heatpipe tower design that helps efficiently dissipate heat away from the device it is cooling. The cooler is also constructed of high-grade aluminum fins and copper base for maximum heat transfer performance. This product includes installation parts for Intel LGA 2011/1366/11353/775/1151/1150 CPUs, and is backed by a 3-year warranty from EMAX.