Fan classification: hanging neck fan. Material: ABS. Motor type: Brushless motor. Number of blades: No blades. Power mode: USB. Whether built-in battery: built-in battery. Built-in battery capacity: 5000mAh. Wind speed gear: 3 gears. Operation mode: button. Noise: 46-70db. Whether to support charging: support. Charging indication: the red light flashes when charging, and the red light goes out when fully charged. Combination form: single piece. Colors: wheatgrass, blue-gray, off-white. Appearance size: 18.5*17.6*6.7cm/7.28*6.93*2.64 inches.