This cooling neckband fan adopts semiconductor cooling technology, the current generated by the semiconductor heat dissipation chip generates a temperature difference, and achieves instant cooling within two secondsSoft silicone material with adjustable flex construction provides comfortable neck protection and adjusts size to unused neck circumference The neck fan is as light and portable as earphones and hangs around your neckSpecial handheld design lets you free your hands and enjoy the cool breeze while doing what you wantPersonal air conditioner has two built-in 1800mAh polymer batteries, which can be charged for 3 hours, whether it is working or shopping, it can be used for 8 hours or 18 hours (depending on the speed)The first mode is a light wind mode, the second is a low wind mode, and the third is a high wind modeOur Hands-Free Small Neck Cooling Fan features a dual-fan design that makes it easy for you to get super comfortable This neckband air cooler gives you the flexibility to adjust the wind direction up to 45 degrees, allowing you to find the perfect winddirectionnotes:Light shooting and different monitors may cause the color of the item in the picture to be slightly different from the actual item Measurement tolerance is +/- 1-3 cmMaterial: SiliconeProduct name: neck fanBattery capacity: 1800mAhCharging time: 1 8 hoursService life: 8-10 hoursRefrigeration range: 6-9 degrees CelsiusSize: 18 6*20*6cmProduct weight: 340gPackage Contents: 1 * Neck Cooling FanTips:You should tie your hair up before using the mini personal fanCharge the fan if it can't reach 3 speed or won't stop