SCSI: DB-25 Serial Ports: 2 Sound Output: stereo 16 bit. ADB: 1 Ethernet: AAUI-15 Machine Gestalt ID: 47 PRAM Battery: 3.6V lithium (Maxell ER3S, Radio Shack 23-026) Minutiae: Upgraded with two SIMMs at a time. Can be accelerated with Newer Technology's 256KB Cache SIMM, part # 7CC256A. Serial Port with the phone icon supports synchronous modems, with handshaking on both the output and input. Has 4MB ROM and a 1.44MB SuperDrive.