Supported System Software: 7.5.1, 7.5.3
SCSI: DB-25
Serial Ports: 2
Sound Output: stereo 8 bit.
ADB: 1
Ethernet: use Newer Technology 7ET-L10, 7ET-L10/100, 7ET-C10 or 7ET-C10/100
Machine Gestalt ID: 98

Minutiae:

Apple sometimes advertises this as a 66 MHz machine, since the clock speed is doubled inside the processor chip.  However, all I/O to the processor is done at 33 MHz. 

Upgraded with one SIMM at a time. Socket closest to CPU (the inner socket) can only accept a single sided SIMM. These SIMMs may be 1MB, 4MB, or 16MB in density. The outside SIMM socket can accept any standard 72-pin SIMM such as 1MB, 2MB, 4MB, 8MB, 16MB or 32MB.  Additional memory can be installed on the DOS card.

Sound output is 16-bit stereo for CD playthrough.  Sound output is 8-bit for Macintosh generated sounds.  Front headphone jack is 16-bit stereo.

Has a 32-bit 030 LC Processor Direct Slot (PDS).

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

Has 1MB ROM and a 1.44MB SuperDrive.