Compact and energy-efficient USB fan designed various DIY cooling and ventilation projects. Features a multi-speed controller to set the fans speed to optimal noise and airflow levels. Dual-ball bearings have a lifespan of 67,000 hours and allows the fans to be laid flat or stand upright. USB plug can power the fan through USB ports found behind electronics and on portable power banks. Dimensions: 1.6 x 1.6 x 0.8 in. Airflow: 12 CFM Noise: 18 dBA Bearings: Dual Ball
