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: CPU performance can be increased with Newer Technologies NUpowr 183 MHz PowerPC upgrade, part # 7NU1400-183. NUpowr has a 183 MHz 603ev processor with 128 KB of level 2 cache. The PowerBook 1400 family 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. 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).