SCSI: DB-25
Serial Ports: 2
Sound Output: mono 8 bit.
ADB: 1
Ethernet: none
Machine Gestalt ID: 17
PRAM Battery: 3.6V lithium (Maxell ER3S, Radio Shack 23-026)

Minutiae:

Requires an Apple Memory Expansion Board (M6361LL/A or similar) for further memory expansion.  The Apple Memory Expansion Board has 1MB memory soldered on it, and two SIMM sockets.  Be sure to configure the jumper as needed when memory is added to the card.

Serial Port with the phone icon supports synchronous modems, with handshaking supported on the output, not the input.

Has 512KB of ROM and a 1.44MB SuperDrive.