I bought this to use for outdoor work (cleaning). It's cool with the cold air, but it felt a bit cumbersome while working, so I didn't use it after the first time and decided to sell it. For commuting, going to school, or using it at home, it's hands-free, so I think it's convenient and comfortable. When you press the power button, it cycles through: battery level indicator → air volume 1 → air volume 20 (photo 3) → air volume 40 → air volume 60 → air volume 80 → air volume 100 → power OFF (photo 8). It charges via USB. Comes with the box (see photos), USB cable, and instruction manual.