1. Low noise fan.
2. The build quality is sturdy with clear thought put into longevity.
3. USB connection, which can work with any USB adapter or power bank
4. Low energy usage.
5. Exquisite black spray metal grill, no rust, and no fading
6. The USB cable was very long and the switch panel was easy to access
If you are looking for specifications beyond these, we shall be happy to customize the fan material, fan speed, fan voltage, airflow, static pressure, noise level, etc.