Features: 1.Adjustable Settings: The cooling fan top Features: 3 adjustable levels to meet your different needs. The noise is low, and it can work continuously without interruption. 2.Large Battery Capacity: With a 20000mah power supply, the power can last up to 12 hours on high and up to 24 hours on low, providing strong battery endurance. 3.Works Quickly: With high speed fans around the waist, the top allows a large amount of air to flow parallel to the skin, which evaporates sweat quickly and reduces temperature. 4.Multi Purpose: Designed with short sleeves, the top not only provides cooling but also offers sun protection and wear as a protective jacket. 5.Versatile Application: Can be used in high temperature environments, outdoor adventures, and travel, made from a lightweight and breathable polyester fiber material, durable and easy to use. Specification Item Type: Cool Top Material: Polyester, plastic, metal, electronic components Power Bank Battery: 20000mah 3.7V lithium battery (included) Power Bank Input IN: DC 5V=2.1A Power Bank Output OUT: DC 5V=2.1A Size Details: L: Center Back Length: 64cm / 25.2in, Bust: 54cm / 21.3in, Shoulder: 46cm / 18.1in, Sleeve: 25cm / 9.8in XL: Center Back Length: 66cm / 26in, Bust: 56cm / 22in, Shoulder: 47.5cm / 18.7in, Sleeve: 26cm / 10.2in XXL: Center Back Length: 68cm / 26.8in, Bust: 58cm / 22.8in, Shoulder: 49cm / 19.3in, Sleeve: 27cm / 10.6in Package List: 1 x Top2 x Fan1 x Speed Control Line1 x Power Bank1 x Charging Cable1 x Instruction Manual