Battery voltage: 3.7V Input voltage and current: DC5V/1000mAh Output power: 3W Charging time: about 2 hours when fully charged Battery capacity: 1800mAh Working hours: The first fan can be for about 6 hours; the second fan can be for about 4 hours; the third fan can be for about 2 hours Working current: First gear 5V/180mAh; Second gear 7V/250mAh; Third gear 9V/310mAh Working power: First gear 0.9W; Second gear 1.75W; Third gear 2.8W Operation method: 1. Plug in the USB cable, the red light will be on when charging, and the light will be on when fully charged 2. Press the button once to enter the first gear, and the white indicator light is dimly lit. 3. Press once for 2 levels, and the white indicator light is on. 4. Press once to enter 3 levels, and the white indicator light will be bright. 5. Click to shut down, keep looping