[Bladeless Neck Fan and Cooling]The neck fan adopts the bladeless design, quieter and safer than the traditional USB fan.A circumferential air outlet with turbine blades that increase the air volume by 90 percent , which can cool the whole sultry heat. [Low Noise and Comfortable]Neck fan Excellent upgraded technology with multi-level air duct design greatly reduces fan noise.The food-grade silicone material is added to the middle body of the portable fan, which is non-slip and skin-friendly.The width and angle of the fan can be adjusted freely.Hanging around the neck, free your hands anywhere, the bladeless design allows you to do so. [USB Charging and 100 Gears]USB fan mini Built-in 4000mAh battery provides 3 to 6 hours of working time (depending on the speed of different gears).USB powered rechargeable fan, can be charged by computer, phone charger, mobile power, etc. [Elegant and Safe]The appearance of the neck fan is the earphone design, fashionable and versatile, no need to worry about frizzing your hair and free your hands.Hanging on the neck, suitable for travel in hot weather, saves you the embarrassment of dripping sweat suddenly in many places in public, it is your good helper in summer. [Summer Essentials and Practical]This portable neck fan is a perfect summer companion that you can take with you when exercising, cooking, doing housework, exercising, traveling, outdoor activities or whenever and wherever you need it.So great and awesome gift for dads, moms, girlfriends, friends, kids, classmates and colleagues. Button Function: Short press to turn on first gear, then short press to turn on semiconductor function (semiconductor max., 4W), Long press (turn off) Button Function Fan speed adjustment: Scroll clockwise for "and" fan power (higher speed) Scroll counterclockwise for "-" fan power (slow down) The encoder cycles through 100 gears in total. The data will be shown on the display when the gears are adjusted. Display Display function: 1. Power display: 1 percent -100 percent battery power display when charging (lightning symbol flashes) 2. Encoder gears: 1-100 gears 3. Display switching: standard gear display when power on, switching to power display after 2 seconds, display of wind speed when adjusting the knob Battery function Built-in battery-2000mAh, 2 batteries (one each on the left and right) Fan blade 1 Quantity: diameter 4010, hanging frame fan 5V Speed: 6000rpm Fan blade 2 Quantity: diameter Turbo Fan diameter 36mm , 9V Speed: 7500rpm Heat sink material: aluminum alloy Power: 4W 5V 0.8A Size:23x23x 4.0mm Net weight: 330g Power mode: USB Appearance size: 175x50x213 Wind speed gear: 100 gears Battery life: 6-8 hours (inclusive) Fan classification: Hanging neck fan Package contents: host, manual, data cable Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.