The frequency of this ultrasonic cleaning machine is 30KHz. The small water bubbles generated by ultrasound can easily reach the slit and quickly remove stubborn stains. The powerful ultrasonic cleaning machine can achieve 360 deep cleaning without damaging the smooth surface of items such as glasses, watches, rings, coins, dentures, utensils, and chains, especially your jewelry. 250ml rectangular water tank, this rectangular ultrasonic cleaning machine leaves space for your glasses. In addition to a 250ml capacity and detachable top cover, you can easily place makeup brushes, necklaces, watches, toothbrushes, and other cleaning items without being limited by the shape of the ultrasonic cleaner. After using ultrasound to clean your glasses, your jewelry will shine again. High quality and safe materials, equipped with silicone strips at the bottom of the ultrasonic bath, prevent slip and reduce noise. You don't need to go to a professional cleaning workshop. This ultrasonic device can quickly clean your glasses, jewelry, dentures, watches, pacifiers, coins, makeup brushes, tableware, and more at home. Package includes: 1 * cleaning machine Attention: 1. Due to manual measurement, please allow for minor errors. Please ensure that you do not mind before bidding. 2. Colors may vary depending on the monitor, please understand. Hello, please pay attention to your shipping address when purchasing products. If your delivery information (such as name, street, house number, doorbell/email without a name, etc.) is incorrect, the order will not be delivered correctly