Strong Wind and Quiet Design - 4 adjustable wind speeds deliver flexible cooling for home use or travel such as camping. - Brushless motor and upgraded fan blades provide efficient performance with minimal noise. Noise level is ≤ 30 dB for a calm and peaceful experience. Long-Lasting Rechargeable Battery and Power Bank Function - Internal high-capacity battery charges in 3-5 hours via Type-C cable. - Runtime ranges from 10 to 30 hours across different modes, ensuring cool comfort through the night. - USB-A port enables emergency charging for GPS or phone, helping you avoid power anxiety during outdoor trips. Portable and Backpack Friendly - Compact size designed to fit easily into a backpack, enabling simple carrying and storage without added burden. - Rotatable and foldable hook design at the bottom allows convenient hanging on a tent or tree branches, or placement on desks at home or in the office. Use scenarios - Camping or outdoor trips: hang the fan from a tent or branch to stay cool without occupying desk space. - Travel and commuting: lightweight and compact for easy packing and on-the-go cooling. - Home or office use: place on a desk for quiet, dependable cooling during work or relaxation. Specifications and features - Wind speeds: 4 adjustable levels - Noise: ≤ 30 dB - Battery: built-in high-capacity, Type-C charging - Charging time: 3-5 hours to full - Runtime: 10-30 hours depending on mode - Power bank: USB-A port for emergency GPS/phone charging - Mounting: rotatable and foldable bottom hook for tent, branches, or desk use - Fit: compact enough to fit in a backpack for easy carrying and storage