Longlasting battery life: 4000 mAh battery provides up to 16 hours of uninterrupted cooling, making it suitable for indoor relaxation and outdoor adventures. airflow: 100 adjustable wind speed levels allow you to tailor the breeze from a gentle fan to a strong gust, helping you stay comfortable in varying conditions. Smart LED display: Clear digital readout shows the current speed setting and remaining battery life for easy monitoring and quick adjustments. Flexible airflow direction: A 90degree adjustable air duct directs airflow where you need it, enhancing cooling efficiency in homes, offices, or outdoor spaces. Use scenarios: At home in a living room or bedroom for extended, cooling. In an office or study for focused, comfortable airflow during work. Outdoors during camping, picnics, or travel where long battery life and adjustable airflow are advantageous.