O2Cool 10 inch Portable Smart Power Fan w/AC Adapter & USB Charging Port - The Smart Power technology automatically selects the lowest cost power option. This fan can be powered by plug-in or by 8 D-Cell batteries (not included)， or use built-in rechargable batteries. There is also a USB Power Port for charging your cell phone or other mobile devices.

• Powerful 2 speed 10-inch blade
• Convenient flip-up handle
• Stable base with stabilizing feet
• Tilts for directional air flow
• Compact design makes it great for travel; easy to carry and store
• Perfect for camping and outdoor activities
• Ideal for power outages
• Rechargeable batteries: Included
• 12V/1Amp AC Adapter: Included
• 12V Adapter: Included
• Rechargable Battery Life - up to 5 hours