The CE-158 extension is the communication tool for the PC-1500 and provide interface to personal computer world.

It comes in a big box.

The CE-158 and accessories are well packaged.

There is :
The CE-158 interface
The EA-21A power adapter with 8,2v output
The user manual (here in the five major languages)
One metal part for connecting directly to the PC-1500(A)
One metal part for connecting to the CE-150 printer and cassette interface
To screws for the metal parts
One keyboard mask.

Here is the PC-1500 + CE-158 system :

And the PC-1500 + CE-150 + CE-158 system :

You’ll find more informations in the user manuals :

Download US	Download JP
Manuals extracted from the EU manual
Download DE	Download FR
Download IT	Download SP
Download US

Next time we will see the hardware side (Cable, Electronic boards…)