Winner of the Edison Award for innovation, this is the device that whitens teeth faster and provides longer-lasting results than any at-home treatment. Invented by a dentist, the included mouthpiece emits LED light and heat directly to teeth coated with the included hydrogen peroxide gel, whitening teeth by five shades in as little as five days. This enclosed treatment system prevents whitening oxygen from escaping the teeth, ensuring maximum exposure and resulting in teeth that remain white for up to 30 days. Unlike lesser methods, the gel is free of alcohol and carbamide peroxide, eliminating the discomfort for those with sensitive teeth and allowing use on crowns, caps, and veneers. Requires four daily 8-minute treatments for three to 10 days. Includes 10 gel packs that enable 40 applications. Rechargeable battery provides up to two hours of treatment after a four-hour charge via AC. 6 1/2" L x 6 1/2" W. (1 3/4 lbs.)