Specification:
Operating Voltage Range: 4.5-5.5V DC
Rated Current: 0.08A (0.20A Max.)
Rated Power: 0.40W (1.0W Max.)
Speed: 4200±5%PRM
Working Current: 0.2A
Noise Level: 22 dBA
Cable Length: 1m / 39.37 in
Size: 40*40*10mm / 1.57*1.57*0.39in
Bearing: Oil Bearings, About can run 30000 hours
Bearing is high precision, long life and low noise

Package Included:
4 x 4010 DC 5V USB Brushless Cooling Fan