LCD and Viewfinder
Sony A900 has a Fixed Type 3" LCD screen with a resolution of 922k dots. Both the screen size and the screen resolution is up to the standards of this class.
A900 has a built-in Optical (pentaprism) viewfinder. The viewfinder has a coverage of 100% and a magnification ratio of 0.74x. 100% coverage ensures that what you see in the viewfinder while shooting matches exactly what you will get later in your image, helping accurate framing your shots and minimizes the need for cropping images later.
Max Shutter speed
Sony A900 can shoot continuously at max speed of 5 fps
and has max shutter speed of 1/8000 sec
Unfortunately A900 doesn't have a built-in flash but it has a flash shoe for mounting external flashes.
Sony A900 features a Phase Detection autofocusing system. The AF system has 9 points to choose from.
Unfortunately Sony A900 doesn't have Video recording ability.
Connectivity and Storage
You can connect A900 to compatible devices via its HDMI port or USB 2.0 (480 Mbit/sec) port.
Sony A900 is powered by battery which provides a shooting life of 880 according to CIPA standards.
Considering that the average battery life of DSLR type cameras is 943 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 Advanced DSLR Cameras
Nikon D780 with its 2260shots is the model with longest battery life among Advanced DSLR cameras. Check the comparison of Sony A900 vs Nikon D780 or take a look at Longest Battery Life DSLR cameras list.
Sony A900 Features Compared to Main Competitors