EmazingLights Sound Activated Light Up Rave Shirt 100% Cotton Please beware: items offered by sellers other than "EmazingLights / iHeartRaves / INTO THE AM" are low quality COUNTERFEIT and FAKE products. LIGHT UP THE NIGHT: Features a built-in sound activated Electro Luminescence panel with a battery pack that snuggles discretely into a pocket inside the T-shirt. Watch the lights dance to the beat of the music and control the flashing speed with the adjustable volume sensor. Each sound frequency will activate a different equalizer bar, just like the equalizer on your stereo at home. BE THE LIFE OF THE PARTY: Our sound activated light up shirts are the perfect accessory for concerts, music festivals, sports events, raves, glow in the dark parties, novelty and gag gifts, Halloween costumes and much more! HIGH-QUALITY CONSTRUCTION: The sound activated illuminating panel is powered by 4 AAA batteries (sold separately) that will keep you lit all night long. The soft, 100% cotton fabric is breathable and will keep you comfortable until the sun rises. EASY CLEANING: Just unplug the battery pack and throw it in the wash! Music festivals Raves Concerts Parties Holiday Events Costumes Trade shows &amp; corporate events ...Or any night time event! Adjust the flashing speed with the volume sensor Powered by 4 AAA batteries Lasts 10-14 hours (depending on the length of use &amp; battery brand) Unplug the battery pack for easy washing