LCD and Viewfinder
Canon 50D has a Fixed Type 3" LCD screen with a resolution of 920k dots. Both the screen size and the screen resolution is up to the standards of this class.
50D has a built-in Optical (pentaprism) viewfinder. The viewfinder has a coverage of 95% and a magnification ratio of 0.6x. 95% coverage means that what you see in your viewfinder while shooting will slightly be different from the actual image.
Max Shutter speed
Canon 50D can shoot continuously at max speed of 6.3 fps
and has max shutter speed of 1/8000 sec
50D has a built-in flash, and it also has a flash shoe to mount your external flashes too.
Canon 50D features both Contrast Detection and Phase Detection autofocus (AF) systems which ensures speed and accuracy of focusing in most situations. The AF system has 9 points to choose from. Canon 50D also features Face detection AF
where it intelligently detects the faces in the frame and locks the focus automatically.
Unfortunately Canon 50D doesn't have Video recording ability.
Connectivity and Storage
You can connect 50D to compatible devices via its HDMI port or USB 2.0 (480 Mbit/sec) port.
Canon 50D is powered by battery which provides a shooting life of 800 according to CIPA standards.
Considering that the average battery life of DSLR type cameras is 909 shots, its battery life is about average in its class but it would still be wise to invest in some spare batteries for long photo trips.
Battery Life Comparison in Semi-Pro DSLR Cameras
Nikon D780 with its 2260shots is the model with longest battery life among Semi-Pro DSLR cameras. Check the comparison of Canon 50D vs Nikon D780 or take a look at Longest Battery Life DSLR cameras list.
Canon 50D Features Compared to Main Competitors
You can download Canon 50D's User Manual here