1、SEMICONDUCTOR DUAL COOLING: Neck cooling fan uses semiconductor cooling technology, 1 second cool, built in 324 TEC cooling unit, cooling effect increased by 600%. 2、TOP AND BOTTOM AIRFLOW: Neck cooling fan up and down around the air supply, wind is 30 times more than the single sided wind, front and back can blow, cool the whole body. 3、HIGH SPEED MOTOR: Hanging neck fans with high speed motor, speed 20 times higher, to promote 17 liters of strong airflow, wind power cooling fast. 4、3 ADJUSTABLE WIND SPEEDS: USB powered neck fan supports three adjustable wind speeds, multi scene use, anytime, anywhere, enjoy the cool and refreshing. 5、BLADELESS TURBINE FAN: Portable neck fan is an external centrifugal bladeless turbo fan, long hair blowing at will, tangled hair is impossible, hair close to also not stranded. 1 x Hanging Neck Fans1 x Power Cord1 x Instruction Manual Item Type: Hanging Neck FanMaterial: ABSVoltage: 5VCurrent: 2ABattery: Li Polymer 4000mAh (Included)Gear: Three GearsGross Weight: 556g/ 19.6oz