stainless steel Ultrasonic cleaner Specifications: Power: 150W Volume: 4,000mL Power supply: 220 to 240V AC, 50/60Hz Operating frequency: 42kHz Inner box size: (L) 300 x (W) 155 x (H) 100mm Interior size: (L) 330 x (W) 180 x (H) 240mm stainless steel ultrasonic cleaners used for industrial purposes but can use in household, excellent effect to clean personal articles such as gold and silver jewelry, necklaces, earrings, glasses, nozzles, watches, mobile, denture, experiment and equipment Stainless steel Ultrasonic cleaners are faster, more consistent, and safer than any other cleaning product that utilizes an ultrasonic cleaning process. Hand scrubbing, soaking, or steam does not even come close. Stainless steel Ultrasonic cleaners are portable but include the same high power, rugged transducers found on industrial systems sold to the automotive, electronics, and metalworking industries. These Ultrasonic Cleaner use engineered ceramics to assure both durability and superior power. Ultrasonic Cleaner are coupled with a new sweep frequency capability, so you get the best possible cleaning every time, all the time.