Each time the power button is pressed, it can be adjusted to the wind strength in three steps of weak, middle, and river. By using 18650 rechargeable batteries of 2200 mAh capacity without using AA or AAA circular batteries, you can use it semi-permanently without maintenance cost. You can charge the battery by USB connection to the adapter. (I Will Give A Bag Ring To Everyone Who Purchased.) Usage time: 2 ~ 8 hours Charger: Input: DC 5V Output (max): 4.5W Charging time: 4 to 5 hours Size: 12.5 x 3 x 23.3cm Weight: 147g Size: 5 x 1.2 x 9.4 INCH Weight: 4.99 OZ
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