Features: 1.CD-rom drive installation, support more than 90% of the common market case 2.Alarm temperature can be set manually, the range is 40 degrees to 90 degrees. When the computer temperature exceeds this range or the fan is stuck, the alarm will sound automatically, which can effectively avoid the damage of computer hardware due to overheating 3.The computer temperature can be adjusted by manually setting the fan speed down/up 4.Intelligent detection of computer temperature, when the computer CPU temperature is too high or the detection point temperature is too high, automatically reduce the movement and increase the fan speed, when the computer idle or detection point in the standard range of automatic fan speed, reduce fan noise 5.Computer fan controller support perpetual calendar time display, very convenient and practical specification:Item Type: Computer 3-Fan Speed Controller Model: STW - 5023 Material: ABS Screen: LCD screen (support perpetual calendar time display) Adjustment Mode: Automatic or manual adjustment Number of Controllable Fans: 3 Groups Single Fan Power: 10W Fan Connection: 3 x 3-Pin male (compatible with 4-pin connector) Fan Wire Length: Approx. 60cm / 23.6in Power Connection Interface: 1 x Big 4 pin male Power Cord Length: Approx. 21cm / 8.3in Number of Temperature Inspection Wire Probes: 3 Main Board Battery Type: 210mah CR2032 button battery (not included) Compatible Panel: Front panel for 5.25in optical drive PackageList: 1 x Controller 4 x Screw 1 x Sticker 1 x User Manual