Dual fans can operate independently for flexible cooling. If you don t need both at the same time, you can run a single fan. Strong mode fully circulates air in a car or indoor space to help you cool down. Power options provide versatility. In a car, plug a USB car adapter into the cigarette lighter and power the fan from the USB port. At home or in the office, it can be connected to a laptop or a USB adapter for operation. When outdoors, use a power bank to power the fan and stay cool anywhere. The package includes a stand for convenient placement and support. Key benefits and practicality: - Independent left and right fan operation for targeted airflow - Strong mode for enhanced cooling in car or indoor environments - Multiple power options: car USB, laptop USB, USB adapters, and portable power banks - Easy to use at home, in the office, in the car, or on the go - Compatible with standard USB power sources for broad versatility