1. Containing dual ball bearings for long operation life
2. Can run continuously for 50,000 hours and be mounted in any direction.
3. Double-sided grills for safe operation
4. USB power for convenient use
5. Speed control with 3-speed gear
6. With supplied USB adapters, it can work with voltage from 110V to 240V, with different plugs working with countries worldwide
7. Compact size, sturdily built, fit in any narrow spaces
8. Whisper quiet
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.