Rave Raptor Ear Phones Beat Sound Activated LED Shirt Sound activated LED Panel Black high quality cotton t-shirt Each shirt comes with an adjusted volume sensor to adjusted for the speed of the flashing. Volume Sensor accepts two AAA battery (not included) Hand Wash Only [EXCLUSIVE WARRANTY] HIkari Company offers an exclusive manufacture warranty of 3 months. This warranty is exclusive to sales through Hikari Company and only our authorized re-sellers. Purchases made through unauthorized re-sellers would not fall under the manufacturer's warranty. Please do not purchase from various third party seller as it will NOT be included in our manufacturer's warranty, and may be a knock off and therefore be unsatisfactory quality.