A 3D hologram fan is a device that uses persistence of vision technology to create the illusion of a three-dimensional image or video. The fan contains a series of LEDs or other light sources that spin rapidly, creating a visual effect that appears to be floating in mid-air.

The 3D hologram fan is typically used for advertising or entertainment purposes, such as displaying product images, logos, or animations. The fan can be controlled using a remote or a smartphone app, allowing users to customize the images or videos that are displayed.

The resolution and quality of the 3D hologram fan can vary depending on the model and manufacturer. Some models may have a higher resolution and be able to display more detailed images or videos, while others may be more suited for displaying simple designs or logos.

Installation of a 3D hologram fan typically involves mounting the fan on a wall or other surface and connecting it to a power source. Some models may also require additional software or hardware to operate.