Ultrasonic cleaner sweep mode vs dual frequency

[HobGoblyn]

Hi all, looking for a cheapish ultrasonic cleaner.

I’ve read that I should get one with sweep mode.

A fair few that I’ve looked at don’t mention ‘Sweep’, but do say they are ‘Dual Frequency’.

Are these the same thing please?

For example

https://www.amazon.co.uk/POLLOR-Pro-Series-Ultrasonics/dp/B0CBLDKBDG?th=1

Thanks

[HobGoblyn]

I think they are different and on the dual frequency one I can select either frequency but not sweep between the two.