Summary: The Zalman Fan Mate 2 Fan Speed Controller is a nice little gadget to add to you case when you need to reduce the speed of a noisy fan. I had an old but unused fan that was really noisy and needed something like this device to be able to reduce the speed and this work out perfectly.
Pros: This component is rated (on its labeling) for .7 amps and 12V. But its listed as only rated for 6 Watts (the manufacturers web site concurs). If I use VA ratings for the controller (0.7 amps x 12V) and also use the same for my fan (1 amp x 12V) there close enough. Its been a month and no problems. Zalmans Fan Mate 2 looks solid and its much bigger than those small 1/8 W potentiometers (variable resistors) that come bundled with a CPU fan. You'll need a splitter if you...
Summary: The Good: Excellent controller and a great bargain. Simple, straight line wiring, with nice long leads. I have placed this controller inside the left side panel near the panel fan, needing only one connection to the main chassis. However, I could have just as easily mounted the controlled on the back, with the panel fan still requiring just one connection to the main chassis. The wires that comes with the controller are very long.
Summary: Basically, this is a small fan controller that has a small turning knob and two 3 pin connectors. One connector is plugged into a fan header on the motherboard and the other into the fan. Turning the knob will slow or increase the fan's spinning speed by increased it's wattage. The controller can be installed anywhere on or in your case thanks to the double sided tape behind the fan controller.
Summary: This fan speed controller was just ok. It comes with some of the other zalman CPU coolers by default. Designed to mount in a case via double sided tape. Seemed kinda simple compared to a drive bay controller. It works, just kinda simple.
Summary: If you like to fine tune system performance The Zalman controller is a definate option. The controller mounts inside the case. personally I like the external controllers. Even if they use up a 5.25" drive bay.