Nikon KEYMISSION 170 Reference Manual page 58

C
Recording Time and Playback Time
The frame rate of add slow motion varies depending on the Movie options setting.
If 1080/30p or 1080/60p is set, the camera switches to slow motion recording with a
size/frame rate of 1080/120p.
If 1080/25p or 1080/50p is set, the camera switches to slow motion recording with a
size/frame rate of 1080/100p.
For example, if you record a movie in Add slow motion with the 1080/30p setting, the
camera records the movie four times faster than normal, and the movie plays back four
times slower than normal.
C
Operations Available When Recording in Add Slow Motion Mode
You can add highlight tags (A34).
Movies
Selecting the Movie Mode
39