Battery Health Management HD LED display shows wind speed and battery level in real time. The battery reminder function helps you avoid unexpected power loss and plan charging accordingly. Decent Battery Life Designed for all weather cooling needs. Charges via regular USB ports, laptops, mobile power supplies, and car chargers. Delivers up to 12 hours of persistent breeze on a full charge. Convenience of Carrying Sleek compact handheld design for easy carrying outdoors and in daily commutes. Fits easily in a bag or backpack for on the go cooling. Special Cooling Experience Rolling button for seamless wind adjustment. Provides precise control to meet different wind requirements in various settings. Key attributes Function: Handheld cooling fan with wind speed display, battery level monitoring, and a battery reminder. Compatibility: Recharges through USB ports, laptops, power banks, and car chargers. Size and form factor: Compact handheld design suitable for outdoor use and travel. Performance: Up to 12 hours of operation on a single charge with real time wind and battery readouts. Materials: Not specified in the original description; designed as a sleek handheld unit. Use scenarios Outdoor activities such as hiking, camping, or beach trips where a portable cooling option is beneficial. Daily commutes or travel, providing cooling without needing a wall outlet. Desk or space cooling at home or in the office for focused comfort without distraction.