SOJITEK Samsung Galaxy S7 Silver Twinkling Light Clear Case w/ Fire Works Pattern (Patent Pending Twinkling Light Technolgy using LED Flash Alerts) Clear PC case with Transparent PET Film pattern Transparent PET FILM Pattern that light up the case using LED Flash Alert The Case lights up and looks beautiful especially at night when Notifications arrive. NO extra battery needed, operated by using LED Flash Alerts. Check the Instruction to activate the phone case. Good for people who have hearing difficulties Check out our Youtube channel @Sojitek