Stackable, multi-device heat dissipation, the overhead layer can be used to place other items such as mobile phones, mobile power supplies, optical modems, etc. Equipped with 4 height-increasing foot pads to save space and completely free up more space at the bottom. 11 high-pressure fan blades, the air volume can reach 65.8CFM. 850RPM high speed, the maximum decibel of the hydraulic bearing is only 18dB (A). Integrated structure, the maximum load-bearing capacity can reach 20KG. Dual USB ports powered design, plug and play, keep it tidy and manage cables easily. Maximum air volume: 65.8CFM Maximum noise: 18dBA Rated voltage: 5V DC Rated current: 0.07A0.03A Fan speed: 850RPM10% Operating voltage: 8-13.2V DC Service life: 40,000h Colour:Black Material:plastic Package Contents: 1 * Router Cooling Base Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.