Lenovo launches Chromebooks with pen and touch for $269 and up - Liliputing
Using the Lenovo USI Pen! : r/chromeos
Lenovo Rechargeable USI Pen for 300e/500e Chromebook gen 3 – Perduko Online
Amazon.com: Pencil Stylus for Lenovo Chromebook Duet 3/5 Pen,Minilabo Touch Screens Active Stylus Digital Pen with 1.5mm Ultra Fine Tip Stylist Pen for Lenovo Chromebook Duet 3/5 Drawing and Writing Pencil,Pink :