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.
9” active matrix LCD - 4 bit (16 grays) Display.
Has a 152-pin PDS (Processor Direct Slot) connector for connecting to the Duo Docks.
Serial Port with the phone icon supports synchronous modems, with handshaking on both the output and input.