FLashing wolrd Wireless Masquerades Masks/Guy Fawkes Mask/Halloween Mask/Light up Mask/Fawkes Mask/DJ Mask/Wireless Mask with On and Flash by One Size Filled Most Face Battery pack takes 1 AAA batteries and has 2 settings: Full On, Blink Battery pack is in the backside of the mask,No need to put your inverter into your pocket. Mask light will remain bright for up to 12 hours per set of batteries Perfect for Halloween, Costume Parties, Masquerades, Mardi Gras, Rave Festivals, Carnivals, Gifts, and more We offer 3 months warranty