With Smart Power Energy Efficient Technology, this fan assures that you will never be without a cooling breeze! You can power it in four different ways: Rechargeable batteries, AC Adapter (included), Auto 12V Adapter (included), or 8 D Cell alkaline batteries (sold separately). Cell phone going dead No problem! With its USB port, you can charge it along with your other electronic devices. Noteworthy features include pivoting fan cage with fold-down handle, LED power indicator lights and a compact design that makes it great for travel and easy to carry and store. Blade: 10" Safety Features: Protective grill Dimensions: 5 3/4"L x 12"W x 14 7/8"H