1.Metal material 
2.With large,high-performance and extra quiet 2 fans, 
3.Helps to dissipate the heat-air 
4.Convenient,reliable and comfortable to carry 
1.Speed:2300RPM 
2.Air Flow:28CFM 
3.Rated Current:180MA 
4.Voltage:5V DC 
5.Power:0.9W 
6.M.T.B.F:30000 Hours 
7.Compatible laptop: 8"-14"