Panasonic casette recorder. 

Works!

It comes with a power supply.

No no NO NO batteries included.

Does include the tape shown.

I did test with both batteries and line power. 

It worked in both cases.

The volume works great - NO noise upon adjusting volume.

This unit is compatible to record computer programing.

In 1978 I took my first computer course on a radio shack TRS80.  This is the style recorder we used to save our programs at the end of each class.

Ships in a padded flat rate envelope