NIUNIU DURABLE MATERIALS: The portable handheld fan is built with a durable brushless motor for longer working life. High-Performance Battery: The USB handheld fan is powered by a 1200mAh high-quality rechargeable battery with high performance and high efficiency, which can provide you with 4-5 hours of continuous working time depending on the wind speed. You can take this portable mini fan for walks, shopping or other outdoor activities without worrying about the battery. Four wind speed modes: 3 adjustable wind speeds, which can control the slow, medium and fast air volume according to different needs. You can enjoy the breeze from slow, moderate and fast gentle wind is the best helper for hot flashes Works while charging: Get power from USB devices like power banks, computers, laptops, USB chargers, etc. When the mini handheld fan is connected to a power source, this rechargeable handheld fan can continue to work. Put in the base (included) and it can become a regular personal desk fan. The mini USB fan takes 2 hours to fully charge. Portable Size: Handheld Travel Fan Battery Powered Design Quantity: 1 pieces Size: 106*42*205mm Color: blue