SCSI: DB-25 Serial Ports: 2 Sound Output: stereo 16 bit. ADB: 1 Ethernet: AAUI, 10baseT Machine Gestalt ID: 510 PRAM Battery: UNKNOWN Minutiae: IMPORTANT NOTE ABOUT 128 MB DIMMS: Due to height restrictions in the desktop case, 128 MB DIMMs are not available for this machine. They are available for the mini-tower model. Upgraded with one DIMM at a time. 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.