... Light Technology Easy to use teeth whitening gel specification:1, Teeth whitening gel adopts light technology to whiten your teeth2, Light treatment is the latest whitening ... deep to remove embedded stains5, Mini blue light. 6, Accelerate whitening with this 90 nm light. 7, Battery life 6 hours. 8, ... , Can be used in conjuction with syringe and tray whitening kits. TW02 Blue light teeth whitening gel