Max Shutter speed
Sony RX10 II can shoot continuously at max speed of
14.0 fps and has max shutter speed of
1/2000 sec. RX10 II also has an electronic shutter which can shoot silently at max speed of
1/32000s. 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
RX10 II has a built-in flash, and it also has a flash shoe to mount your external flashes too.
Focusing
Sony RX10 II features a Contrast Detection autofocusing system. The AF system has 25 points to choose from. Sony RX10 II also features
Face detection AF where it intelligently detects the faces in the frame and locks the focus automatically.