-Battery capacity:1800mAh
-Voltage working range:3.0-4.2 (V)
-Wattage:5 Watt
-Charging time: 3-4 hours
-Rotation speed:8000 times/1minute
-Output:4W
-Input:D 5V 500mA
Comfortable upgrade
-Big neck, easy to wear.
-Tall, short, fat and thin can be worn comfortably.
Package Included:
1 * Fan
1 * USB cable