Hey Ric - here are the specs, and no, not a wireless mouse or keyboard, just old fashioned USB.
Thanks,
Jim
Machine Model: Power Mac G5
CPU Type: PowerPC 970 (2.2)
Number Of CPUs: 1
CPU Speed: 1.6 GHz
L2 Cache (per CPU): 512 KB
Memory: 1.25 GB
Bus Speed: 800 MHz
Boot ROM Version: 5.1.4f0
Serial Number: YM404GGKNV9