16 LED Teeth Whitening Light with 3 Adapters: iPhone, Android, USB. Our Teeth Whitener Light needs no batteries or additional Teeth Whitening Trays. Works with Teeth Whitening Strips or any Teeth Whitening Gel (sold separately, not included). LED Blue Light is 100% safe for whitening teeth and causes no negative side effects or tooth sensitivity. Compatible with 4G and newer.