Amazon.com: Honeymoon Case Cover for Lenovo Yoga C640 C640-13IML 13.3 Inch,PU Leather Folio Stand Case Compatible with Lenovo Yoga 6 13ARE05 [Not fit Yoga 6 Pro &Yoga 7/Yoga 5G/Yoga 9/Yoga 9i],S005-13-Black :
Does Lenovo's Yoga C640 work with an active pen? | Windows Central