Detailed Product Description Features: 1) Folding notebook cooling pad, two pcs extra quiet fans built-in Induction-switch,when laptop placed onto the pad then automatic working 2)Integrated 3 ports USB HUB(2.0 or 1.1) and 5 in One card reader(SD/MS/Pro.MMC/SM/XD) 3)USB connection extension hidden,automatic retractation when pressing button 4)Folded SIZE: 30.8*12.5*1.7CM,expanding size:30.8*25*1.7CM 5)Narrow enough to fit into most carry-on luggage,,convenient for traveling 6)Reduce the heat of fast microprocessors really 7)Supports self-powered and outside DC5V power supply mode 8)Drivess,hot plug & play,suitable for any size of notebooks packing: Gift box:20PCS/CTNS,42*35*31CM sensor Notebook cooler pads