... )Power:100W 2)Amplitude:45UM 3)Stroke:20000-30000HZ/secon RTW1400 Mini Ultrasonic Grinding MachineTechnical parameters:1.Power Supply:AC110V/220V2 ... .minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); Mini Ultrasonic Polishing Machine RTW1400