From the manual:

The MultiRam //e card is an expandable extended 80-column memory card for the Apple IIe. MultiRam's memory is expandable from 64K to 768K and has a built-in 16 bit processor port. An optional 768K expansion board is available to connect to the MultiRam //e memory card giving a total on-board memory if 1.5 megabytes and RGB video.

MultiRam //e fits in the //e aux slot.

768K total memory.

For the Apple IIe 2e.