Rock out in our Red Retro LED Sunglasses. These unique Red Light up sunglasses off the classic 3 light settings; steady on, fast flash, slow flash but also feature a surprise setting. Flick the switch and they turn into sound activated light up sunglasses! These bright Red Sunglasses look great during the day and then add an extra feature of bright red LEDs built in. These sound activated LED sunglasses are perfect for clubs and concerts. One size fits most! AG13 batteries includes and installed.