SCSI: HDI-30
Serial Ports: 1
Sound Output: stereo 16 bit.
ADB: 1
Ethernet: none
Machine Gestalt ID: 310
PRAM Battery: service center replacement only

Minutiae:

Comes with 8 MB soldered on the motherboard, and either 4 MB or 8 MB installed in an “Apple only”  memory slot.  A “third party”  memory expansion slot allows piggy-backing of up to two additional memory cards. (NOTE:  A 32 MB or a 48 MB module cannot be paired with any other module.)

Has expansion bay for a floppy disk drive, CD-ROM drive, 2nd hard disk, magneto-optical drive, Zip drive, or battery storage.

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

Built-in speaker and integrated microphone.

Has security slot for locking (requires 3rd party cable).