Model 24 - A stylish Ultrasonic cleaner that looks as formal as the items it enhances. Five time intervals ensure that each item receives the perfect degree of care. It includes a basket and watch stand and can be used for items other than jewelry (watches, glasses, toiletry items etc.). The Model 24 Rayn Ultrasonic Jewelry Cleaner uses 46,000 Hz of ultrasonic sound waves and water to thoroughly and gently remove dirt from the surface of many objects which are otherwise difficult to clean. The Model 24 includes an easy-to-read instruction manual, a digital timer, an LED indicator and a 20-ounce tank.