-Effective heat dissipation prevents notebook from overheating. -Low speed (600rpm) = low noise level (16 dba) -M.t.b.f.: 80,000hrs -Light and compact for easy travel -Plug & play, usb powered -Compatible with win98 se/ win me/ win 2000/ win xp/ win vista and mac os9/o

1.With two fans 2.Easy go, no power adapter necessary and conveniently power through USB port 3.Ergonomic shape for easy type 4.Supports plug-and-play function for USB device like mouse, keyboard and card reader 5.Supports low noise

1.With three fans; 2.Two-double; Heat disaipation; 3.Extend notebook PC life; 4.Large airflow; 5.Extra quiet; 6.Light-weight and easy to carry

1.Material:Aluminium 2.Total dimensions:324*270*35mm 3.DC fan size:70*70 *15mm 4.Speed:1,500 +/- 10%rpm 5.Fitted with USB 2.0 ports