Penelope works great on GGTS
device, it also works on Provari, silver bullet, and other devices.
As for Airflow that is only on GGTS Penelope was made fopr Proteus
device. Proteus is not out yet.
Is Penelope a great add on to are build able ati HELL YES!!! Its GG, God's Gift to
vaping.
If you want to see Penelope in action feel free to watch my vids.