Need compatible Pen/Stylus for HP Dragonfly G4

[MRJTLT]

What is a compatible pen or stylus for the Dragonfly G4 laptop. We've purchase two now, an HP Rechargeable Active Pen G3 and the HP Pro Pen G1. Neither of them work with the DF G4. We've tried the app but it won't work with the Dragonfly. 

Any suggestions are more than welcome.

Thank you!

[YangQuan]

I did research - looks no pen works for Dragonfly G4 laptop. I'm very unhappy. Any one else got a stylus pen working on G4 laptop? Please share information. I bought G3 pen, nor working, wasted $50. HP - do you hear ?