Item Type: Ultrasonic Cleaner Model: 113HTD Type: Digital Timing Heating Inner Tank Capacity: 1.3L Inner Tank Size: Approx. 150 x 140 x 65mm / 5.9 x 5.5 x 2.6in Ultrasonic Frequency: 40KHz Ultrasonic Power: 60W Heating Power: 100W Number of Vibration Heads: 1 Working Time Range: 1-99min Temperature Range: 0-80 C Liner Material: SUS304 Stainless Steel Shell Material: Stainless Steel Basket: Equipped Sound Reduction Cover: Equipped Q: What is an ultrasonic cleaner? A: Ultrasonic cleaning is based on the cavitation effect caused by high frequency ultrasonic wave vibration signal in the fluid. Microscopic bubbles are formed, and then implode violently causing the cavitation which create an intense scrubbing action on the surface of the item being cleaned. Bubbles are small enough to penetrate microscopic crevices, cleaning them thoroughly and consistently. Q: Which products can I clean this model? A: Many products can be cleaned, such as glasses, necklaces, earrings, bracelets, electronics, watches, dentures, printer ink heads, shaver heads, nibs, coins, badges, pacifiers, etc. Q: Which washing aid can be properly added for better cleaning during the cleaning process? A: You can add cleaning liquid or detergent, such as: dishwashing liquid, soapy water, disinfectant, etc. However, do not add acid or alkaline solution, prevent ABS corrosion damage. Q: Common products have 40HZ or 33HZ. What is the difference between these two frequencies? A: These products are divided into high frequency and low frequency. Generally, the high frequency has 40HZ and 42HZ, and the low frequency generally has 28HZ and 33HZ. The higher the frequency, the larger the number of bubbles generated, the smaller the bubbles, and the better the cleaning effect for some blind holes; the lower the frequency, the smaller the number of bubbles generated and the larger the bubbles, which is suitable for cleaning large surfaces. Products with both frequencies can be better cleaned.