Features: 1. LED digital display, real-time monitoring of power, gear, built-in 4000 mAh lithium battery, battery life 2 hours. 2. 360° Surround air outlet, 15° slight angle, precise air supply. 3. Three-speed wind adjustment, dual-core turbo, stronger power, quick cooling. 4. Hanging neck design, free hands, easy to use. 5. Matte texture, ABS material, firm and skin-friendly. Specification: Material: ABS + Electronic Components Color: White/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 .