... :li-ion battery & 3-AAA wireless inverter 3. Chargeable Wireless EL T-shirt/cordless EL T-shirt /Wireless T-shirt 1.Accessories: EL ... , USB interface cable, Velcro,Lanyard.2.Two types of EL wireless inverter:Chargeable Li battery inverter (battery included)Chargeable dry battery ... based on the music around.4. Hang the lanyard onto wireless inverter if necessary.5. Press transparent"on/off" sticker on ...