【New Work Vest with Innovative Technology】 Runs for up to 26 hours! Unisex Size: XL Material: 100% Polyester It takes in air from both sides of the waist and creates a comfortable airflow upwards, effectively releasing the heat trapped in the body, allowing you to feel cool. 【Powerful 5V Airflow, Energy-Saving Design】This product's fan and battery set uses a 5V power supply, but by thoroughly optimizing its structure and performance, the airflow is comparable to a 12V fan, far surpassing typical 5V products. In addition, the battery's 5V output is precisely tuned, achieving excellent energy-saving performance while maintaining strong airflow. 【41400mAh Ultra-Long Battery | Built-in Type-C Fast Charging | Clip-on Design for Easy Portability】This battery has a large capacity of 41400mAh, providing long-lasting and stable power to the air-conditioned workwear fan, eliminating the need for frequent charging. It has a built-in Type-C fast charging function, allowing for quick charging, and can also supply power to smartphones in emergencies. The body size is 13.6 x 6.9 x 3.4cm, and it weighs 457g, making it compact and lightweight. It features a convenient clip on the back, which can be easily attached to a belt, making it comfortable to carry. You can easily enjoy coolness anywhere. The battery is PSE certified, ensuring long-term peace of mind. 【Enhanced Airflow & 3-Level Airflow Adjustment】It adopts large-area 3-blade fans, generating more powerful airflow to keep a wide area comfortably cool. The airflow can be adjusted in 3 levels: "Strong," "Medium," and "Weak." The battery output uses a USB connector, enabling stable high output. 【Heatstroke Prevention & Wide Range of Uses】The air-conditioned vest fan and battery set not only reduces fatigue and improves work efficiency in the harsh summer work environment but is also effective as a heatstroke countermeasure. Applicable scenes: Suitable for various outdoor activities, including construction sites, warehouses, outdoor work, postal delivery, fishing, agriculture, delivery, and event staff, for both men and women. Furthermore, it is also perfect as a gift for family and friends. 【Air-Conditioned Workwear Fan and Battery Set Contents】1 vest, 1 battery, 2 fans, 1 USB fan cable, 1 USB-A to Type-C charging cable (30cm), 1 instruction manual.