Can be inexpensively accelerated to speeds of 30MHz or more, using Newer Technology's "Variable Speed Overdrive™", part # 7VS-A.

Can be accelerated with Newer Technology's 128K slotless "Cache 040™" card, part # 7CC128C-33.

Can be accelerated using Newer Technology's 50MHz "Meteor™", part # 7QD-C.  Can also be accelerated with Newer’s 50MHz  "Meteor+™", part # 7QDP-C.

Four SIMM sockets.  Upgraded with four SIMMs at a time.

This computer comes with 1024K ROMs and an Apple 1.44MB SuperDrive.

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

Sound output is 8-bit stereo.

This computer has an international power supply.

This Mac contains an 040 Processor Direct Slot (PDS).