The Power Of Crest Ultrasonics:The Powersonic model P500 is a 1.5 gallon ultrasonic heated cleaner comes equipped with a Digital display 0-99 minute timer and a thermostat range of 20-80 degrees Celsius (175 degrees Fahrenheit) with 400 watts of heat. Crest Ultrasonics Brings More Power To You In A Small Footprint: The Powersonic P500 ultrasonic cleaning unit comes with a 2 year parts and labor warranty. Crest's Powersonic rugged industrial-strength performance gives you consistent quality at a benchtop price. Crest's exclusive Powersonic feature ensures uniform cleaning throughout the tank by sweeping the ultrasonic frequency 3 kHz, creating overlapping ultrasonic waves. This eliminates inconsistent cleaning due to hot spots (areas of intense ultrasonic activity) in the cleaning solution, caused by the unvarying or "standing" waves produced by conventional ultrasonic power supplies. Cleans Like No Other Benchtop Available!: When the Powersonic ultrasonic energy is introduced into a cleaning solution, cavitation, the foundation of ultrasonic cleaning, occurs.