If you're thinking about investing in a cavitation machine, there are a few things you should keep in mind to ensure you're getting a quality machine that will meet your needs.
First, consider the power output of the machine. Cavitation machines use ultrasonic waves to create cavitation bubbles, and more powerful machines will be able to create more cavitation bubbles. If you're planning on using the machine for professional treatments, you'll want a machine with at least 3 watts of power.
Second, take a look at the size of the machine. If you're only planning on using it for small areas, like the face, then a smaller machine will be just fine. But if you want to be able to treat larger areas, like the legs or stomach, then you'll need a larger machine.
Finally, check out the warranty and return policy before you make your purchase.