Specifications: -Incorporates USB 2.0 by 4 Ports HUB -Extra-Quiet cooling fans -Keeping your notebook cool and extend the life of your notebook -Will protect working area from heat of your Notebook -Multi-Functional incoporated key features for complete versatility -Heavy duty design for longer life -Power easily supplied Via USB Plug-And-Play connection -Reliable,Convenient And Portable -Packaging: 20pcs/CTN, G.W.:20kgs, N.W.:17kgs,Dimenson:60*45*42cm