Wear the funky led foam necklace around your neck choosing from four flashing led chaser sequences one size fits all with easy onoff fastening and soft foam casingr r chasing flashing effect led foam necklacemulticoloured leds inside a foam necklace casingfour chaser sequencesclick onoff with buttonlength 77cm supplied with 3 x ag13 batteries en71 certified amp rohs compliant