Safe bladeless Neck Fan:Neck fan adopts the leafless design,a wrap-around air outlet , make you feel cool quickly within 5 seconds!USB or Battery Powered:The portable neck fan adopts the latest low-power design,Built-in 4000 mAh battery provides 2 to 8 hours of operating time.With low/medium/high 3-speed levels, you can adjust the appropriate fan speed by pressing the power button.The neck fan is as light and portable as a headset and is hung around the neck providing easy Refrigeration. Hanging on the neck is suitable for traveling in hot weather.Portable fans are very suitable for personal cooling, offices, churches, outdoor activities, such as camping, traveling, hiking, climbing and watching sports games.