RGB Programmable: Plug the mini fan into the USB port of the computer (no data cable required), and the user can freely program the message and change the color through the software. (The software is not compatible with the macOS system). Safety and Flexibility: USB computer fan features PVC soft fan blades and a flexible neck for safe use. The neck can be twisted to direct the airflow in any desired direction. Widely Compatible: USB LED fan offers cool design and convenience for use in the office, bedroom, or during camping. Compatible with laptops, power banks, and any available USB power source. Easy to Carry: Compact mini USB fan with small size for easy portability; fits in a bag, ideal for hot summer days. Custom messages can be saved permanently, even when powered off. Suitable for use as a laptop fan or personal USB gadget. Ideal for gifting to family and friends. Program personalized messages or display custom text for home, office, or promotional use.