ENVIRONMENTAL RESISTANT FAN: IP67 design technology allows this to be completely dustproof and waterproof (rated to be submerged up to 1m for 30min). HIGHER AIRFLOW/LOWER NOISE: Updated blade and motor designs allow this to put out 201 cubic feet per minute with a noise level of 39db. That's less than a standard kitchen fridge. LONG LASTING: Dual ball bearings give a long projected lifespan of up to 67,000 hrs-that's over 7 years. Backed by manufacturer with a 3 year warranty. FULL KIT: Includes a compact UL rated AC to DC power supply to plug into a standard wall outlet. Also includes two grills and nuts/bolts for mounting.