Coolerguys Thermostat Controlled Single 120mm USB Fan Kit USB powered Thermostat controlled for easy setup and operation. Quiet 120mm fan: turns on at 88 degrees F and off at 81 degrees F Comes with screws, bolts and mounting bracket, everything you need to setup and install the unit Can be used for intake or exhaust Dimensions: 120x120x25mm Bearing: Dual Ball 1200 RPM Operation Voltage: 3.5V-5.5VDC Input current: 0.30 Amp Max Operation temperature: -10 to +65 C Storage temperature: -40 to +70 C RPM: 1200 +/- 10% CFM: 46  dB: 20 Front plate Dimensions:                                                   8.25&#034; x 6.25 (210 x 159mm) Cabinet Cut-out Size:                                               7.4 x 5.12 (188 x 130mm) Single/Dual 80mm: 4.25&#034; x 4.25&#034;/7.87&#034; x 4.25&#034; Single/Dual 92mm: 4.75&#034; x 4.75&#034;/8.87&#034; x 4.75&#034; Single/Dual 120mm: 6.25&#034; x 6.25&#034;/13&#034; x 6.25&#034; (triple not available in USB)