Feature●Lower Ventilation Design: Adopts a advancement design on the bottom to prevent the intake from being obstructed by your clothing. Equipped with a brushless motor, it has a stronger wind power and a longer lifespan and reduces noise. Equipped with SOS lamps and flashlights, it is also great for outdoor workers●(3 Levels of Air Flow Adjustment) The air flow of the waist fan is weak (11.3 m/s), medium (wind speed of 4.5 ft/s); strong (wind speed of 3.9 ft/s); can be used for a long period of time over 8 to 28 hours; depending on the degree of heat. Simple one-button design allows you to adjust the airflow more convenient●USB Rechargeable - Large Capacity 10,000 mAh: Uses a Type-C 5V/2A charging system. Charging time of the main unit takes about 4 to 6 hours. Equipped with a USB-A 5V/2.4A output, so it can be used as a mobile battery for charging mobile phones and gaming consoles, in case of emergencies due to insufficient power consumption such as mobile phones and game consoles●Lightweight, Compact and Drop Resistant Design: Size: Approx. 3.5 x 1.9 x 4.4 inches (88 x 47 x 112 mm); Weight: Approx. 12.2 oz (360 g). Material: ABS + Silicone Flashlight:3W/300LM, Warning light:1W The lower back fan features a brushless motor for better airflow and faster air circulation●[Safe Warranty] We can accept returns, exchanges, or refunds. Buy with confidence. If the product is defective, we will respond quickly within 24 hoursDescription