Crest 3D Whitestrips with Light's unique blue light system uses the same type of light technology dentists use. The blue light weakens stains so that the whitening ingredient can work more effectively. The result is dramatically better whitening compared to strips alone. #1 Dentist recommended at home whitening kit brand./br/br1 Light and 10 teeth whitening strip treatments, each with 1 upper and 1 lower strip. Apply once a day for 60 minutes. Whitening results last up to 36 months. Apply light to upper and lower teeth until it turns off automatically. Full results in 10 days. When used as directed, Crest Whitestrips with Light whitens dramatically better than strips alone. A lightweight, disposable, water resistant, handheld device that weakens stains. Crest's best and fastest whitening technology at home./br/brGTIN: 889714000588. Best Sellers Rank: See Top 100 in Climate Pledge Friendly. Age Range (Description): Adult. Flavor: Unflavored. Item Weight: 0.22 Pounds. Unit Count: 1 Count. Item Dimensions LxWxH: 6.42 x 1.89 x 6.58 inches. Number of Items: 1. Item Form: Strip. Product Benefits: Whitening. Brand: Crest. : B01M63SQTI. Manufacturer: Procter & Gamble - HABA Hub. UPC: 889714000588. Batteries: 2 Lithium Metal batteries required. (included). Item model number: COMINE5005454. Product Dimensions: 6.42 x 1.89 x 6.58 inches 3.52 Ounces. Is Discontinued By Manufacturer: No.