UAE emulates the following hardware:

• A 68000/010/020/040 CPU, optionally a 68881 FPU
• OCS, ECS and AGA Graphics Chipset (including sprite-playfield collisions)
• Up to 2MB Chip RAM and up to 8MB Fast RAM, or 8MB Chip RAM without Fast RAM
• Up to 64MB Zorro III Fast RAM, independent of Chip RAM setting (68020+ only)
• Up to 1MB Slow RAM, for extended compatibility with problem software
• Up to 8MB of graphics card memory, usable by software that supports Picasso 96 compatible graphics cards
• 4 x 3.5" floppy disk drives (DF0:, DF1:, DF2: and DF3:). It's not possible to read Amiga disks, so these are emulated with disk files.
• A hard-disk: either a harddisk image file or part of the native filesystem
• Joystick support (with option of mapping joystick to numeric keypad)
• Mouse support
• Ability to run in various screen modes (for better display quality or better speed)
• Full stereo sound support, consisting of 4 x 8bit channels
• Simple parallel and serial port support. Note: the parallel port is not really implemented. Though it's sufficient for printing.
• state-saving. you can save the state of your emulated Amiga and continue later on.
• some other things which don't work well enough to mention them here...