yeah, I got one of them using beans i had on my PCBway account.
It's a solid state coil and drives the primary coil direct.
Works pretty well for its size.
Bluetooth audio connection and a siggen app on your phone is pretty cool, and you can get to a higher frequency doing that than you can with just the freq knob on the front.
The tip of the breakout point starts to glow red hot at higher frequencies. Though i'm not sure if that's a good thing, might be overdriving it.
Don't expect to get good tesla coil music out of it, it's really only of use with a sig gen app. Maybe wave files generated from midi would work.
But any generic audio like youtube vidoes sounds terrible
If you want i can test the BT range.