●USB charging and 3 speed settings rechargeable lithium battery and USB charging. This USB rechargeable fan comes with a 4000mAh rechargeable lithium battery for easy charging via computer, mobile phone charger, power bank, laptop, etc. With the three speed adjustment function, you can choose your preferred airflow. ●COOL & SAFE The neck fan has 78 vents to cool down quickly within 3 seconds. The bladeless design allows the elderly and children to use it without worrying about the fan getting caught in the hair, and the 360 degree surround air brings you a cool experience. ●Adjustable gooseneck fan. The hanging neck fan uses high-quality silicone, the angle can be adjusted at will to better fit the skin and prevent it from slipping off, and the elasticity is good to prevent breakage. The silicone also insulates the heat generated by the long service life of the fan, bringing heat insulation. ●Quiet & Durable We use energy saving brushless motor on this mini neck fan, the brushless motor makes this fan very quiet when it is running. This fan is powerful but weighs only 250 grams, so it is easy to carry and wont fatigue even if worn all day. ●Service and - Venforze offers 24 hours customer support and all fans have a one-year . You can contact us by email or directly on Amazon. We provide the best products and service for everyone.