Product information：  

Material: copper-aluminum combination
Bearing type: hydraulic bearing
Speed: 2200
Noise: 22
Service life: 3
Heat dissipation: air cooling
Size: 9 (cm)
Features: mute

A: Ultimate version, dual fans, Aurora colorful lights
B:Ultimate version, dual fan, magic light
C: Ultimate dual fan red light
D:Ultimate version, dual fan, green light
E:Ultimate Edition Dual Fan Blu-ray
F: Ultimate single fan Aurora colorful lights
G: Ultimate single fan Symphony lights
H: Ultimate single fan red light
I: Ultimate single fan green light
J: Ultimate Single Fan Blu-ray