Feature: 1. Wide range of applications:Use for both indoor and outdoor activities, office, subway, traveling, camping, picnic, hiking. 2. Air volume level 3: weak wind natural wind strong wind 3. The neck fan has 78 ventilation holes that keep the face cool and can keep the makeup. It can be used safely by children and adults. 4. Wingless design, you don't have to worry about hair being caught by fan blades. 5. Equipped with 3000 mAh battery, the battery life is approx. 16 hours 6. Half-closed air inlet, dust and sweat proof. Specification: Product material: ABS environmental protection raw material Product size: About 197 * 198 * 60MM long Wind speed: three adjustable, one breeze, two natural wind, three strong wind Product weight: About 350g (weight with battery) Product packaging: neutral color box Output power: 4.5w Input current: DC 0.5a/1a Output voltage: dc5v-9v Input voltage: DC5V Package includes: 1 x Fan 1 x USB data cable