Name:  R4-V4 name:  R4-V4 line:  Disney Droid Factory release date:  April, 2015 source:  - note:  This is the fourth R4 astromech version (thus V4) released in the Disney Droid Factory series. link:  Adam Pawlus' review Wookieepedia:  astromech droids. Wookieepedia:  R4 series.