feature:1. Portable and foldable2. Two-speed height adjustment3. Hollow bottom heat dissipation4. Non-slip siliconedescribe:1. Color: Silver/Grey2. Size: 24.9*22*2.7cm3.Suitable for: 11 - 17.3 inch laptops and tablets4.Function: Foldable Laptop Elevated Stand and Hollow Bottom Design5. Fan interface: USB-CSpecification:1. Dual high-efficiency fans The laptop cooling fan has two high-efficiency fans for better heat dissipation.2. SUPER STRONG AND PROTECTIVE: The laptop riser is made of high-quality aluminum alloy and is strong enough to withstand 22lbs (10kg) without worrying about shaking at all. The enlarged non-slip silicone perfectly avoids slipping or scratching the surface of the laptop, making your computer more stable on the desktop.3. Freely Adjustable: The laptop stand can be adjusted in height from 30mm to 365mm, allowing you to raise or lower the angle of the stand according to your needs. When it keeps your computer high, you can organize office supplies like keyboards, mice and laptops in the extra space (under this stand) to keep your desk clutter-free4. Ergonomic Design: The Z-shaped design helps you adjust the ideal height for comfortable typing, viewing and sitting. By adjusting the height to your perfect eye level, this is great for better posture, relief from back/neck stiffness and stress. Thoughtful computer racks for work5. Keep Laptop Cool: The holes on the top of the computer stand increase airflow and provide good ventilation, preventing the laptop from overheating and reducing fan noise. Work more efficiently with a functioning computer6. Wide Compatibility: This adjustable laptop stand fits all tablets and laptops from 10 to 17.3 inches, such as Macbook Pro, Mac Air, Google Pixelbook, Dell, HP, Asus, Acer, Chromebook, Microsoft Surface, etc. . It can also be used in offices, libraries, kitchens, to store laptops, tablets, projectors, menus, books, magazines, etc.What's Included: 1 Foldable Laptop Tablet Stand with Cooling Fannotes:1. Transition: 1cm=10mm=0.39inch2. Please allow 1-3mm error due to manual measurement. Make sure you don't mind before bidding.3. Due to the difference between different monitors, the picture may not reflect the actual color of the item. thanks