* Multifunctional USB fan: can installed on a plant stand rack or plant shelf, keep your plants cool and circulate the air. Also perfect for receiver DVR playstation TV box computer cabinet cooling.
* 3 speed adjustable: features a multi-speed controller, you can adjust the fan speed easily, optimal it to suitable airflow levels. Maximum speed is 1500 RPM.
* Low noise and dual ball bearing: each fan is engineered to be ultra quiet while delivering high airflow. Dual-ball bearings have a long lifespan.
* Multiple protection: have metal grille on both sides, protect your hands and plants when the USB fan is working. Square design allows the fans to be laid flat or stand upright.
* Dimensions: 4.72 x 4.72 x 1.77 inch, air flow: 50 CFM single fan, noise: 20 dB. No adapter included. 2 fans connect to one USB cable and work at the same time.