Plamsa pen control energy output by voltage, high level plasma
such as beierpalsm K85 using voltage plus frequency control output to get more power level and function. Mostly use plasma sine wave, very a little machine may use plasma squre wave
such as plasma pen K29 the 2nd generation.
Electronic pen control energy by power output without transformer inside,
so it is only electronic shooting. Easy to burn down and cause skin spot after treatment, burn too much.
On the other hand, plasma shooting is very focus and smooth, even do not cause huge fire sparkle but could burn skin so that cuase smaller treatment wound. Electronic will burn close skin organization on surface, but energy not reach deeper skin layer, mostly it is only use for spot remove, can not use as plasma eyelid or wrinkle remove pen. >>