Double 14cm fan, large air flow, silent Two ports USB hub, meet USB devices use requirement Six angle support stand, ergonomic design, with the use of more comfortable feeling Unique non-slip technology, ensure that the notebook use safety Specifications: Material: Metal Mesh, Plastic, Rubber Weight: 874g Product Dimension: 353/253/30.5mm (W/D/H) Fan Dimensions: 140x140x15mm Fan Speed: 1200 /-10%RPM Fan Noise: 15:17. dB Bearing Type: Hydro Bearing Fan Life: 20000 hours Voltage Range: 4.5/5.5V Current: 0.32A /-10% Applicable Models: 7/17 inch laptops/notebook Color: Black.