SCSI: DB-25
Serial Ports: 2
Sound Output: stereo 16 bit.
ADB: 1
Ethernet: AAUI-15
Machine Gestalt ID: 65
PRAM Battery: 3.6V lithium (Maxell ER3S, Radio Shack 23-026)

Minutiae:

Upgraded with two SIMMs at a time.

Level 2 cache is upgradable. 

Serial Port with the phone icon supports synchronous modems, with handshaking on both output and input supported.

Has 4MB ROM and a 1.44MB SuperDrive.