Do all Chineese VV mods fire at ~33hz?

[caged]

Just curious if there is a cheapish VV mod that fires at a faster rate.

 

[AnsonJames]

Almost all the new one's do. The last generation had a higher PWM rate but they were totally inaccurate.
The likes of the original Lavatube had filtered PWM - it couldn't hold it's voltage for toffee though.

The Twists and Evic are pretty decent - they're not 33.3hz.