Foldable Laptop Stand Portable Notebook Support Base Holder Adjustable Riser Cooling Bracket For Laptop & Tablet Accessorie Description: Noise level: <40db Cooling technology: air cooling Fan: ?0.9m/s Input power: dual fans/1.5W; four fans/3W Product weight: single/221g; double/299g Rated current: dual fans/0.3A; four fans/0.6A Specifications: 1?Foldable and Portable?Foldable design, easy to store, convenient and space-saving 2?Good heat dissipation?The dual turbo design is suitable for notebook cooling holes. The heat dissipation is smooth 3?Precision Motor?Quiet wind and high speed, selected high-quality electrodes, fast rotation is still silent 4?7-level height adjustable?multiple gears suitable for various usage scenarios 5?Silicone Protection?There are multiple silicone pads on the contact surface to prevent slippage and protect the body from scratches Package Included: 1*Fan 1*Bracket