Lenovo, Accessories, models:

Active Pen 2	Quick Start Manual
Active Pen 3 LP-251	Safety, Warranty & Quick Start Manual
E-color Pen	Quick Start Manual
PA10400	Quick Start Manual
PB300	Quick Start Manual
PB420	Quick Start Manual
PB500	Quick Start Manual
Pen Pro	Quick Start Manual
Precision Pen	Manual
Precision Pen 3	Quick Start Manual
SE-551F	Setup Manual
USB-C	User Manual