REMINDER! Free Optical Lens Upgrade is available and strongly recommended for all Whitening Accelerators (lamps) purchased before April, 2005. This lens upgrade significantly improves lamp performance with the Beyond II gel-type whitening kits. Send your address and Whitening Accelerator serial number (located on the base of the lamp) to info@beyonddent.com for immediate delivery of the lens. This is free to all users of the Beyond system.