Specially designed for cleaning a pair of eyeglasses, it is also applicable for items such as jewelry, watch, fountain pen head, razor etc. With a beautiful shape and compact size, it has an attractive appearance. Using only one touch button for 5 minutes cleaning, it is extremely easy to operate. 20±3W power & 42KHz frequency make its cleaning effect better than many similar products in the market. SUS304 stainless steel tank material ,many experiments assured, resistant to stamping. Only use the plain tap water for general cleaning, about 5-10ml detergent added into water to enhance the cleaning result. Ultrasonic Frequency:42KHz Tank Material:SUS304 & ABS Plastic Tank Capacity:450ml Power Supply:AC100~120V 50 / 60Hz AC 220-240V 50/ 60Hz Ultrasonic Power:20±3W Default cleaning time:3 minutes