Ultrasonic cleaners under 1/2 gallon are designed and marketed for individuals or small businesses looking to clean small items, such as jewelry or model engine parts. But don't be fooled by their size, all of the ultrasonic baths you will find on CleanoSonic.com are true ultrasonic units, where the small GemOro 1.2 has the same kind of piezoelectric transducer that larger industrial units like the Crest CP2600 possess!