Teelight&reg; Superman S MARK LED Sound Activated Equalizer Superman TShirt -- Size M This shirt lights up and reacts to sound.Volume Control for the sensitive of music. EL panel attached to the Disco T-Shirt with Velcro, can be removed and replaced. Has a sound sensitivity control to take you all the way from loud anthem beats to the chill out room. Powered by a battery pack cleverly hidden within an inside shirt pocket. Requires 2 x AAA batteries((batteries not included). Great for music or dance party and sports fans, especial for Hip Hop fans. Size M normally fits 163-170 CM height.