Sound-activated T-shirt reacts to sound or music sensitively and automatically. With Hi-Tech EL (electro-luminescent) panel in front of T-shirt. Keep flashing when you wear it, it will attract much attention and let you become a fashion icon. Unplug the battery box and EL panel to wash the T-shirt. Can remove or replace the EL panel freely and conveniently. Widely used in pub, party, or other amusement places. Ideal for music or dance fans and sports fans, especially for Hip-Hop fans. Come with a battery case hidden inside your shirt pocket. Powered by 2 × AAA batteries (not included). Length of cloth: 68cm, circumference: 50cm, length of sleeve: 56cm. Suitable for 165-170cm in height. Size: M.