Clean AND sanitize in one easy step ! The Dental Spa system cleans using ultra sonic technology, and sanitizes with germicidal UV light. Ideal for dentures, retainers, invisible braces, whitening trays and other orthodontics. Measures 3.5" H x 4.25" W x 4.5" D Can be used for UV only or UV + Sonic cleaning Uses plain water only--no powders or chemicals needed Sonic cleaning at 8,000 vibrations per minute Kills up to 99.9% of germs Compact enough for home or travel use Shuts off automatically after 5 minute cleaning cycle.Due to the hygienic nature of this product, it can not be returned once opened.