... (factory price, good quality,timely delivery)EL flashing t-shirtsDetails of t-shirtsSupply Type: OEM Service Age Group: Adults, Children Material ... for the samples, 400 pieces/day for mass production.Details of EL panels: 1. Flashing Effects: Colorful, unique, vivid, customized2. ... automatically with the existing program, and others move to the beat of the sound, such as the music from the stereo at ...