The Light Up Country Western Pink Cowgirl Hat is the ultimate light up cowgirl accessory! It is perfect for a western party, Halloween or just for fun! Wear the light up cowgirl hat to have the best Halloween costume in the Wild West! To activate the LEDs in the tiara, slide the On/Off button located on the battery pack. The battery pack is on the inside of the cowgirl hat. 4 AG10 batteries are included and replaceable.