This foldout manual is the NEC version of the Sony RMT-F1 infrared remote control for the NEC P6 rebadged Sony FL-F1 portable Betamax recorder. Like other NEC P6 manuals, it is a slightly edited version of the original Sony manual. Click photos for full size
The cover to the manual mostly covers battery information including how to install them.
The different functions of the buttons, and how the sliding cover "locks out" the recording controls.
The back cover advises readers to contact NEC for service, but for something like this they probably would have turned around and had Sony assist... surely they would just send an NEC deck already made by Sony back to Sony to have them repair it.