Welltop 5-inch Portable Clip Fan Rotatable Clamp Fans USB or Battery Powered Table Fan Rechargeable Desktop Fan Personal Cooling Fan Clip on Fan Clip (Black) NOTE: Remove Insulation Cover Before Use NOTE: Please REMOVE the plastic film of the battery before first use, or it won't hold a charge. 2 Ways of Powering - USB powered directly or 18650 rechargeable battery(INCLUDED) powered. 2.5~6 hours working time depending on different speeds. Stepless Speed Technology - Freely to turn down or turn up air volume. The efficient power and conversion circuitry can minimize the energy loss to protect environment. Oscillating Fan with Clip - With clamp on the bottom, it can be used in any places. The middle part and the blades can be rotatable to 360 degrees. Both actions (up and down) are adjustable for 360 degree. Compact & Portable Size - Measuring 5.9"x 7.4" x 4.3", weighting 0.6 pounds, it is convenient to carry. It can be attached the carrier handle, chair, desk, baby stroller, treadmill etc. Note: We have our logo"Welltop" on the product.If you receive the item without our logo, please complain to Amazon directly