USB Physical Cooling Travel Hanging Neck Cooler Earphone Design Sport Smart Fan Features: it is based on the technology of natural water evaporation, providing a cool airflow where you need it most, reducing the temperature of your personal space by up to 6-9 degrees. The portable fan has two wind head, can feel more powerful airflow, so you can adjust 360 degrees for sports, which makes it easy to create powerful wind for you. It's ideal for personal cooling, camping, outdoor event, trips, office, church, hot flashes. free your hands anywhere; Fashion style makes you look so cool. Hanging around your neck, suitable for traveling in hot weather, saved you from the embarrassment of dripping with a sudden sweat in public on numerous occasions. 1800mAh * 2 lithium battery built-in rechargeable battery powered by USB, No extra batteries are required, The small personal fan can be used for 20 hours, 2-6 hours working time USB interface computer, computer hosts, charging heads, charge cards, car USB interfaces, as long as the USB power adapter interface can be used. Low / medium / high speed level. Adjusting fan speed by pressing the power button. Neckband fan with powerful airflow can be fast and easy access to instant relief from hot flashes. Hanging the cooler fan around your neck and take it everywhere. Carry the cool breeze with you, neck design and liberate your hands.Adjustable angle, wind with manual. The wind speed is adjustable to meet the needs of different moments, there is always a cool feeling that you want. Breeze file: Xu Qingfeng, suitable for sitting in the air, driving the summer floating. One-button natural wind - 8 hours, double-key cooling for 2 hours. Stroke: natural wind, suitable for desks and desks, soothing fatigue. One-button natural wind -11 hours, double key cooling 2.5 hours. Strong wind file: cool and cold air, suitable for outdoor travel, dispelling a hot air. One-button natural wind for -18 hours and double-key refrigeration for 3 hours. Made of silicone, soft and skin-friendly. Comfortable curved design, not sweaty and not cumbersome. Adjustable design, comfortable to wear, suitable for all necks. Long press the bottom button for power on/off, blue light when booting Press this button after power on to switch the three sections of air volume, strong / medium / weak Press the penultimate button to start the cooling function, and the blue light is working. When charging, the indicator light shows red to indicate the summary of the ID, and the indicator is full. Silver patch behind the neck is a cold aluminum sheet Upgraded content: One, the use of silent brushless motor, the noise is less, the air volume is greater Second, the use of seven-leaf fan, the air volume is greater, the wind is more uniform Third, use arc-shaped cold aluminum sheet to increase the aluminum sheet area at the same time, perfectly fit the human skin, and the cooling effect is better Fourth, increase the semiconductor heat dissipation system to make the semiconductor heat removal more smooth and make the cooling better Fifth, the new appearance design not only conforms to the ergonomic design concept, but also increases the beauty of the product line detail Product Name: Neck-mounted fan Battery capacity: 1800mAhx2 Charging time: 1.8 hours Life time: 4-10 hours Cooling range: 6-11C Charging interface: 5V2A micro USB Product size: 180x200x60mmC Product net weight: 328g Package included: 1 x fan 1xusb Data line