Scythe Kaze Master Ace 5.25" 4 Channel Fan Controller / Temp Display (KM02-BK) Precious aluminum design: High-quality materials were used when producing the Kaze Master Ace. With the Kaze Master Ace, four fans can be controlled independently, and four temperatures (in either  C or F) can be monitored Wide range of fan controller: The fan voltage can be independently controlled from 3.7 - 12 V, in addition fan can be switched off The front consists of brushed aluminum and accentuates the blue illuminated VFD display in an optimal way. An integrated acoustic alarm function (which can be deactivated by a jumper) warns the user from overheating and failure of a fan.