UnicornTech FN-03 Portable Desktop Fan [2 Types of Usage] USB or Rechargeable 18650 Battery Powered, Up to 10 Hours of Operation When Full Charged, 3-Speed, USB Battery Powered Cooling Table Desk Desktop Personal Fan Breeze Natual Big Powerful Wind Mute Quiet for Indoor Outdoor Home Office Dorm Dormitory Travel Hiking Camping Backpacking Climbing Boating Picnic (Green) Stock on hand will be cleared regardless of cost today. 3 Speed Selections - Breeze, natural wind, and powerful wind. Portable But Powerful - In the powerful wind mode, it offers 3600 RPM and the wind reaches long distance maximum to 10 feet. 10 Hours Wireless Operation - Up to 10 hours wireless operation in breeze mode when full charged; 6 hours in natural wind mode, and 2 hours in powerful wind mode. Mute, Efficient and Durable - On the base of high quality brushless motor and balance self-correcting mechanism.