thermaltake 12cm smart case fan version 2 3 functions in 1 fan smart case fan ii (3 functions in 1) : full speed when jumper on temperature control : fan speed varies according to the temp detected by the sensor manual control : adjust fan speed manually smart case fan ii series in 80, 90, 120mm dimensions 2 ball bearing, extend the operating life 3 to 4 pin adaptor included, to power supply unit bundle with bracket controller, attach to pci slot