Hardware Pacers has posted a review on the Kingwin Aluminum Thermal Center. Here's a snip.
The fan indicator to the right of the RPM displays if the fan is not spinning, spinning normally or spinning at full speed. On the left of the RPM, it displays if power is provided to the Thermal Center and if the HDD is active. The display changes every five seconds and to change what the LCD is displaying, the user has to push the Up or Down buttons. Furthermore, Kingwin Thermal Center adjusts the fan speed by providing only a certain voltage towards the fans at distinct temperatures.
The fan indicator to the right of the RPM displays if the fan is not spinning, spinning normally or spinning at full speed. On the left of the RPM, it displays if power is provided to the Thermal Center and if the HDD is active. The display changes every five seconds and to change what the LCD is displaying, the user has to push the Up or Down buttons. Furthermore, Kingwin Thermal Center adjusts the fan speed by providing only a certain voltage towards the fans at distinct temperatures.