Features: DC24V, 0.36A current Cooling fan, with speed measurement function, provides powerful wind power and accurate speed monitoring. Support DC24V Brushless motor low noise, fast efficient cooling and long life. High efficiency energy consumption ratio, quiet operate, high reliability, easy installs for industrial equipment and electronic products. For engineers, electronic technicians, computer repairers, DIY enthusiasts and other people who need air-cooled cooling or precise 3800RPM monitoring. For Server rooms, industrial equipment, electronic instrument, computer hosts, DIY computers and other place that need heat dissipation and fan speed monitoring. Specifications: Model：MMF 12D24DSRP1 Support: 24V 0.36A Size：about 12x12x3.7cm/4.72x4.72x1.46in Features：Alarm function Speed： 3800RPM Package Includes: 1PC 12CM Brushless Fan note: Please allow 1-2cm errors due to manual measurement. Pictures may not reflect actual color due to different monitors.