... placed into an inside pocket with protective cloth tube. el sound activate t-shirt details: 1. Faric Weight: 180g2. Material ... make customized designs/logos Inverter: 1. Power: DC6V2. Function: Sound active, 5 flashing3. Battery: Requires 4AAA batteries. 1.5V/ ... . 2. For customized logos, about 5-7 workdays. Application: Products promotion, election, festive gatherings, night cubs, discos, bars, dancing ...