A professional glasses washing machine requires fine maintenance and careful care. Advanced ultrasonic cleaning, the vibration frequency is 200 times per second, 40KHz ultrasonic frequency, very efficient. Safety guards, allergic dermatitis, rhinitis, asthma, eczema and other allergic diseases are mostly caused by dust. Cleaning your glasses regularly can help prevent these problems. There are 4 strong suction cups on the bottom to prevent sliding due to vibration during cleaning, and it is equipped with a screwdriver for repair or maintenance when the screws on the glasses are loose. Battery operated for wireless use while traveling, no wires required, 2 AAA batteries required but not included. Not just glasses, contact lenses, watches, jewelry, diamonds, dentures, etc. can also be used to clean contact lenses. Advanced ultrasonic cleaning, 200 vibrations per second, 40KHz ultrasonic frequency, very efficient. A professional cleaning machine for eyeglasses that requires careful maintenance and care. Safety guards, allergic dermatitis, rhinitis, asthma, eczema and other allergic diseases are mostly caused by dust. Cleaning your glasses regularly can help prevent these problems. Not only for glasses, but also for contact lenses, watches, jewelry, diamonds, dentures, and more. Can also be used to clean contact lenses. There are 4 strong suction cups on the bottom to prevent sliding due to vibration when cleaning. Equipped with a screwdriver, it can be repaired or maintained when the screws on the glasses are loose. Battery operated for wireless use while traveling, no wires required, 2 AAA batteries required but not included. Simple design, no need to tilt to work, one-button cleaning. Specification: Product Name: 3-in-1 Portable Ultrasonic Glasses Cleaner Application: widely used Working mode: super sound quality Power: 2 AAA batteries required, batteries not included Size: 164*75cm Color: pink notes: Please allow a slight 1-3cm (0.4-1.18in) difference due to manual measurement and slight color differences due to different display settings. Thank you and have a great day! Package Included: 1 x Multifunctional Ultrasonic Cleaner (Battery Not Included)