Features: Three wind speed adjustment: Three wind speeds are available for adjustment, so you can switch between soft and strong at will, bringing nature home. Silent motor: The fan makes low noise while providing great wind speed, which does not annoy you and your family and affect study, work, sleep, etc. Semiconductor refrigeration: The neckband is made of semiconductor material, which is cool to wear and gives you a refreshing feeling from top to bottom. Long-lasting battery life: The built-in 2000mAh battery can be fully charged quickly, and it can support 6-8 hours of cool wind supply when fully charged. Comfortable to wear: Soft neckband design for easy carring, plus compact size and light weight, make your neck not tired after wearing it for a long time. Specification: Material: Plastic Weight: 260g Color: White/Blue Size: As picture shows Power Supply: USB Noise: 51-70db Rated Voltage: 5V Rated Power: 5W Rated Frequency: 70HZ Wind Speed: 3 speeds Battery Capacity: 2000mAh Battery Life: 6-8 hours Package Includes: 1* Neck Fan