Bladeless and Cool: instead of traditional fan blades, our leafless neck fan adopts 2 turbo motors to transfer cooling and fresh air from 60 dedicated air outlets to drive away heat from your neck to your cheek and face. No more worry about hair/beard getting caught; just slip it on your neck and enjoy the cool breeze while looks coolLasts Up to 21 Hours: built-in 5000mAh rechargeable Battery, this necklace fan works 3.5-21hours depending wind settings (4 speeds including Natural Wind mode); its with the latest USB C charging Tech, quick and easy to charge even via a power bank, stay cool for a long day even during power outage or going outsideIdeal Summer Solution: hand-free, lightweight and curved design, the portable fan stays stable on your neck (wont slide like the others), works quiet if you need it on office, room, kitchen, painting... powerful enough for outdoor activities: golf, mowing lawn, yard work, stroller rides, wondering around , traveling, campingNeck Adjustable: to satisfy the most, we conducted 2000 tests and finally enhanced the design of the neckband to meet different sizes of neck, ensuring it work for adults with big neck and kids with small one; durable, flexible silicone cover on the neckband, soft and comfortable to your neckGifts for all: without any fan blades, our usb fan is safe for children or even pets; 360 degree cooling air vents, lifesaver for women with hot flash; hands-free air cooler, a surprise for dad working outside; keep makeup from sweat, compact mini fan for women can be hanged on neck or packed on bag