Amazon.com: BoxWave Stylus Pen Compatible with HP Envy X360 15M (15.6 in) (Stylus Pen by BoxWave) - AccuPoint Active Stylus, Electronic Stylus with Ultra Fine Tip for HP Envy X360 15M (15.6
Amazon.com: HP Tilt Pen for Windows 10 devices with ink capability and touch screen with digitizer (Dark Ash Silver) : Electronics
Comparing the HP Tilt Pen with other MPP 2.0 pens - YouTube