Enermax 3.5" Fan Controller - Silver A professionally produced 3.5" bay Dual Fan Controller with Dual Temperature Sensors. $22.99

Meet Enermax's entry into the 3.5" Drive Bay Fan Controller market - the UC-A3FATR2 series. They offer variable voltage control over two attached fans (7v to 12v adjustment range), and the ability to monitor two attached thermal probes and the RPM's of any attached fan (provided the fan supplies that data). A Quick Feature Summary: LCD illuminated by blue backlight. Equipped with buzzer alarm for High Temp or Low Fan Speed/Failure Conditions. Alarm setting threshold levels completely adjustable by user. Two 3 pin fan connectors for easy attachment of fans. Dual long (28") Flat Headed Thermal Probes for temperature monitoring. Unit powered by a standard 4 pin power supply connector. Please note that this unit does not allow you to turn off any fan attached to it... only adjust the voltage going to those attached fans. Safe range (until we hear more from Enermax) would be a 8 watts max per channel. The units feature aluminum enclosures, and their face plates nicely match the black and silver finishes found on the most popular current cases (Lian Li, Chieftec, Enermax, etc). The Beige face plated unit is of course ideal for those with standard Beige colored systems. The adjustment knobs for the fan voltage extend out 5mm from the surface of the face plate (important info for those who wish to place one of these in a case with a drive bay cover door).