Features: -LED digital display, real-time monitoring of power, gear, built-in 4000 mAh lithium battery, battery life 2 hours. -360° Surround air outlet, 15° slight angle, precise air supply. -Three-speed wind adjustment, dual-core turbo, stronger power, quick cooling. -Hanging neck design, free hands, easy to use. -Matte texture, ABS material, firm and skin-friendly. Specification: Material: ABS+electronic components Color: green Input and output: 5V/0.8-1A max Rated power: 2.5W Battery voltage: 3.7V Battery capacity: 4000 mAh Gear position: 3 gears Packing list: Hanging neck fan*1 USB data cable*1 Manual*1 .