Hands-Free DesignThis upgraded necklace fan is designed to be worn around the neck so your hands can be free. It's a perfect idea for outdoor event, such as watching soccer and baseball, camping, climbing, fishing, jogging, makeup, cooking, etc. You can hang the fan around your neck and take it everywhere, will not feel tired or uncomfortable.Adjustable AngleThe adjustable angle design can meet the neck of different sizes. The angle adjustment part uses durable materials, which can easily adjust the required angle and make you more comfortable to wear. There will be no clamping of the neck.3 Adjustable SpeedsThis wearable cooler fan is available with LOW / MEDIUM / HIGH speed level to meet your individual needs. 2 - 4 hours working time depends on different modes.USB RechargeableBuilt-in rechargeable 2200mAh lithium battery was powered by USB. No extra batteries are required. This personal fan is compatible with most computers, laptops, portable chargers and other devices with USB output.