... , durable 2.Singlechip controlled 3.Power-off protection... Glass ultrasonic cleaning machine 1,Mini Ultrasonic cleaner features: 1, ... .4, patented product (already adopted by the EU's CE certification, the United States, FCC, etc..)Frequency: 42KHZPower: ... lenses, such as various glasses (including contact lenses), magnifying glass, binoculars, microscopes, cameras, video cameras and other parts of ...