Get it here… http://amzn.to/2oOKzLY
Easy to use: light turns on with the button!
Easy charging: USB charging makes this hat incredibly easy and convenient to charge!
Its size is adjustable according as your need.
Keep warm when you go out at night such as fishing,climbing in the cold weather.
Soft and comfortable,and suitable for most people without the sex difference.
Light source: LED
LED quantity: 4pc
Battery: built-in lithium battery