Ultra Quiet - The Blades design has been upgraded with new technology and high quality ABS, so this small desk fan advanced the sound 25% quieter than others. The min noise is about 25 db, max noise is under 50 db, suitable to use in working and studying 180° Vertical Rotation - Rotate the stand to adjust the wind angles you need, cooling at various angles and improving airflow in small rooms. This classic portable fan with a good quality, prolong the use of the fan, give you a better using feeling 3 Speeds Strong Airflow - Press the button to adjust the speed. Speed 1(Blue Light): slight wind, 2.8 m/s; Speed 2(Green Light): cool wind 3.7 m/s; Speed 3(Red Light): strong wind, 4.6 m/s. This personal fan will surely be one to meet your needs Dual Power Supply - The rechargeable fan built in 2000 mAh battery. You can plug it into the power supply for the lasting working or use the battery for the portable working. The light indicator is red when in charging, and turns green when fully charged Portable Fan- Compact size (7.1*5.7*1.4 inches) and light weight (0.56 lb), blade size is 4 inch. Small and lightweight portable fan is easy to carry. And it is perfect for home, bedroom, office, desk, beach or anywhere you need to make your day cool Product Description 2000mAh Battery The rechargeable fan is built in 2000mAh battery (unreplaceable), and it can also be powered by USB. Compact Size 5.7*1.4*7.1 in, Weight: 0.56lb, USB Cable: 29.5inch/0.75m Rotatable 180° adjustable head Super Quiet Desk Fan The Blades design of this small desk fan has been upgraded with new technology and high quality ABS. So our table fan advanced the sound 25% quieter than others. Especially suiteable for library, office, bed table, and ect.