1. The silent design is more accurately controlled, ensuring high-speed and large wind-mass while being quieter 2. Compared with the traditional two-sided lens, a third side is added, which is more adaptable. Sea view room - chassis fan 3. The street connection design of the mirror is also smoother, and the smoothness of the visual perception - far the previous generation Product net weight:160G Type:forward air Colour:Black Material:ABS Size:120x120x25MM Package Contents: 1 * Chassis fan 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.