... 2AAA batteries pack EL T-shirt, EL flashing T-shirt, sound active EL T-shirt, Equalizer T-shirt Product structure: EL ... /logos Inverter: 1. Power: DC6V, DC4.5V, DC3V 2. Function: Sound active, 5 flashing, Wifi 3. Battery: Requires 4AAA, 3AAA, 2AA ... .563 Waist Width4346495256 Sleeve2021222324 Wide collar1717181819 Wide cuffs1616171718 lady EL sound activated t-shirt with velcro