The fan uses double ball bearings (balls are different from hydraulics and the balls are very durable). The official parameters are as follows:
Dimensions: 120*120*25mm
Pitch: 10.5 cm
Rated voltage: 12V
Rated current: 0.3A
Input power: 3.6W
Speed: 0-2500RPM5% 4-wire temperature control
Maximum air volume: 89CFM
Maximum static pressure: 64Pa
Noise: 0-30DB
Weight: 120g
Fan connector: motherboard standard 4-Pin connector
(Requires board support and speed control function, the fan will be quiet under the speed regulation. Otherwise it will always be 2500 rpm at full speed, full speed sound 30DB)