One button easily turns the hat on & off, as well as controls 3 flashing modes which range from flashing to all on.our light up Xmas beanies are considerate gifts for your family, friends and partner, suitable for wearing on Christmas, New Year, birthday, holiday, carnival and so on.our led Christmas knitted hats are made of quality acrylic which is soft and warm to touch, can bring you a comfortable and cozy wearing experience no matter at cold winter’s indoor or outdoor activities.measures approx. 20 x 21 cm/ 7.87 x 8.27 inches in width and height, contains good elasticity, fit for most adults and children, our novelty unisex led winter hats will be fitting closely without tightening.