. The internally configured 900mAh large-capacity polymer lithium battery can work continuously for 5 hours. 2. The Type-c interface of USB charging, no longer worries about the problem of insufficient power. 3. The flexible clip design helps you easily clip the fan to the chest, waist, backpack, and other places. 4. The wind direction that can be adjusted will brings you a cooler experience. 5. The cleverly designed parts structure reduces the volume of the fan as much as possible, making it more convenient to carry. Voltage: 5.0 volts