Ergonomic design, protect the cervical vertebrae, 9+6 gears freely adjustable to meet your different needs, about 25MM-300MM adjustment range The center part of the hollow design, can let the computer heat dissipation The bracket is made of silicone anti-slip pads to enhance the friction and avoid scratching of the laptop, no shaking, stable and not falling. Made of aluminum alloy, smooth feel not rough, durable and colorless, can bear about 80 pounds Foldable stand, easy to carry and storage Adapt to various sizes of laptops, can be used for tablets