Zalman NC2500 Plus Laptop Cooling Pad with Dual Fans and 3 USB Ports (NC2500 Plus) The entire notebook is quickly and powerfully cooled by quiet dual 50mm axial fans. The stress to the wrist and back is minimized by careful design with the real usage conditions in mind. ZM-NC2500 Plus`s size measures 314(L) x 390(W) x 65(H) and is compatible with notebooks up to 17 inches.