... :BlackSize:S/M/L/XL/XXL1 x Battery pack and sound sensor.Panel is powered by a detachable battery pack.The ... x AAA Batteries (not included)1. Electronic light T-shirt, sound sensitive graphic EQ, complete with battery pack/plug-in module ... . 2. Equalizer is moving according to the sound,when there is sound, the picture will light and flash, the flash ...