40KHz frequency for intensive cavitation rinse: the ultrasonic cavitation machine can clean silver, gold, jewelry, rings, turquosie, diamonds, earrings, necklaces, gems, brackets, coins, retainer, bike chain, glasses, eyeglasses,brass, gun, carburetor, pcb boards, vinyl record, carb, parts etc. 22L/5.81Gal full volume and 17.5L/4.62Gal effective volume: the sonic cleaner or lab ultrasonic cleaner can clean any stuffs which are not longer than 470mm or 18.5inch. Die-casting SUS304 stainless steel tank: make the portable ultrasound machine resistant to weak acid and weak alkalis. Free time setting among 1~99min with smart memory function: extensive time-setting range makes the device be the best ultrasonic cleaner for cleaning sundry small stuffs; especially the preset time can be memorized by the device even after power-off unless it is reset manually. 32~176°F/0~80°C heating temperature range for degreasing and dewaxing with smart memory function: the ultrasonic washing machine can heat to reduce the adhesion strength of oil and wax so as to improve the ultrasonic cleaning effect; especially the preset temperature can be memorized by the device even after power-off unless it is reset manually. NOTE: The device only starts heating when the preset temperature is higher than the actual temperature of cleaning solution.