The InvisiClean Professional Ultrasonic Cleaner features dual transducers that DOUBLE the cleaning power. You get the power of 2 machines in 1! The ultrasonic jewelry cleaner is designed to professionally clean jewelry, gold, platinum, diamonds, rings, watches, eyeglasses, sunglasses, tools, toothbrushes, dentures, mouth guards, cosmetic brushes, coins, and more. A basket and watch holder are included. 110-120 volts only.