Max Shutter speed
Olympus E-M10 III can shoot continuously at max speed of
8.6 fps and has max shutter speed of
1/4000 sec. E-M10 III also has an electronic shutter which can shoot silently at max speed of
1/16000s. One thing to keep in mind is that electronic shutter may cause rolling shutter / jello effects, and also banding issues under artificial light on your images.
Flash
E-M10 III has a built-in flash, and it also has a flash shoe to mount your external flashes too.
Focusing
Olympus E-M10 III features a Contrast Detection autofocusing system. The AF system has 121 points to choose from.
Olympus E-M10 III also features
Face detection AF where it intelligently detects the faces in the frame and locks the focus automatically.