Product details of
Speed mode: 3st gear Input voltage: 5V Input current: 0.2-0.4A Output voltage: 3-4.5V Output power: 1.5W Battery voltage: 4. 2V Charging time:2-4H Instructions for use: 1.1. Please fully charge this product before using it for the first time. You can also use a mobile power supply or computer to charge it. 2. On/off button; press to start the fan, and press again to turn off the fan. 3. When the battery voltage is insufficient, the fan will automatically stop rotating. Please charge it in time. Precautions:
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