USI Stylus Pen for Chromebook 4096 Levels Pressure, Rechargeable Active Digital Pen Compatible with HP, ASUS Chromebook C436, Lenovo Chromebook, Palm Rejection with 3 Extra Pen Tips - Walmart.com
Lenovo Usi Pen : Amazon.it: Informatica
HP USI Stylus magnetizes perfectly to the Lenovo Duet! : r/chromeos