The LED light up hat made by knitting method, soft and comfortable, warm and fashionable Beautiful Design: Christmas hat with a design pattern of Christmas tree and gingerbread man and with six colored led lights, which meet the holiday needs and beautiful fashion Universal Size: This winter warm LED knit cap is suitable for a wide range of head sizes for most children, men and highly elastic women Suitable for: Christmas, Halloween, birthday, holiday, ideal for all kinds of parties, is also the best gift for family and friends Size: 22 x 25cm / 8.6 x 9.8inch (length x height) IMPORTANT: To activate the lights you must follow 2 steps: (Step 1) Inside the seam of the hat there is a hidden switch. Turn the switch to the on position. (Step 2) Press the on/off button to activate the lights. INSTRUCTIONS: (1) Turn switch to "ON" position. Switch is located inside seam. (2) Press the ON/OFF button.