... equalizer light. 2. What is EL sound active T-shirt made up of?1. T-shirt: 100% cotton,180gsm, S,M,L,XL,XXL ... :Powered by 4xAAA batteries (Batteries not included)Inverter is with on/off switch and sensitivity controller-you can select high or ... 4*AAA batteries2.Slide switch to operate power2.Use selector on pack to choose flash pattern3.Do not bend or apply ...