Product parameter: Lifting notebook stand. Material: aluminum alloy / silicone. Size: 235mmx259mmx9.5mm. Application: laptop. Features: height adjustable foldable and portable . dual fans. Net weight: about 335g. Color: Grey. Features: 1. Outstanding heat dissipation performance, dual-turbo heat dissipation design, fits the notebook heat dissipation hole, heat dissipation is barrier-free. 2. Aluminum alloy anodized high-strength aluminum alloy, outstanding texture. 3. Silent wind and high speed, selected excellent electrodes, fast rotation is still silent. 4. Multi-level adjustment, 8 levels of height at your choice, multi-levels are suitable for various scenarios. 5. Silicone protection, no damage to the machine. There are multiple silicone pads on the contact surface, which are non-slip and more personally protected against scratches. The details are full to protect your computer. 6. The heat sink is detachable, which greatly reduces the occupied area and is more convenient to carry.