SR2400 redundant fan kit contains additional 4 fans to provide redundant cooling, Speed Of Rotation: 10000 rev/min, Nominal Current: 1, 4 ?, Power Consumption: 16, 8 W, Supply Voltage: 12 V, Noise Level: 64 decibel, Category: HEATSINKS and FANS, Warning: Computers and computer circuit boards, as well as other electronic equipment, contain lead, which is a chemical known to the State of California to cause cancer or cause birth defects and other reproductive harm, Please wash hands after handling circuit boards and other internal components of computers and electronic equipment, and avoid inhalation of fumes if heating the solder on the internal components or circuit boards, SKU: HYPRM2535