New Viber High Frequency 125 Hz
Made in USA
High Frequency devices are getting more popular as they are offering apparently a better response.
From the latest studies, we recommend 5 minutes per day, 3 to 5 days per aligner.
Get more information on low frequency versus high frequency at:
FDA and CE
More on the Viber:
The mouthpiece for the Viber20 isn't terribly large. We don't know the size of the Acceledent "small" mouthpiece that you mention, but we think that the mouthpiece of the Viber20 will accommodate you just fine.