Rock out in our Red LED Retro 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 included & installed.