Large amplitude. High conversion frequency, low heat. Output is stable. Strict high quality control. Power:50W frequency:40KHz Colour:As Shown Material:aluminum alloy Size:59mmx59mmx53mm Package Contents: 1 x Transducer Only the above kit content, different products should not included. Note: Light mirrored image and various exhibits could cause the color of the item in the picture a little bit different from the genuine thing. The measurement allowed error is +/- 1-3cm.