KJRIVER 7 inch Portable Desktop Battery Powered Fan Built for Reading, Working, Sleeping, Traveling. Table Fan Quiet Low to 30db Noisy - will not disturb you and others when you are reading and working. Step-less Speed Control Fan - To choose the most comfortable wind speed for sleeping. Mini small desktop fan - 145mm * 209mm (L*W) and only 42.5mm (foldable) in depth, extremely space saving and take any where for traveling. Battery Operated Desk Fan What are the diffirence from other similar models? 1. Small Fan Stepless Speed---No fixed speed level, you have various choice to adjust wind speed. 2. Low Noise&Whisper Quiet Fan --- Brushless copper motor reduce noise, and offer various low wind speed with lower noise, especially suit for working and sleeping. 3. 2000mAh High Battery Capacity --- Rechargeable mini fan usb compare with other similar models, provide higher battery capacity, Up to 10 hours of use. 4.USB desk fan upgraded anti-skid--- adding a rubber foot pad that can not slipping. Product specifications: Voltage: DC 5V Power: 4W Net weight: 9.17 ounces (260 grams) Product size: 5.6*8.2*1.6 inch (145*209*42.5mm) USB cable length: 39 feet (1 meter)