4 in High velocity dual powered fan. Assorted Colors: Red/Blue/Silver. AC 120 V 60 Hz. 360 deg vertical adjustable fan head. Powder-coated safety grill for superior durability. Simple On/Off rocker switch. Rubber-tipped base helps prevent vibration. Single speed setting. Silent wind motor and safety grill. Includes 48 in USB cord and AC adaptor for powering from your computer or other USB source or use adaptor for a direct AC outlet. ETL + cETLus.