The Elektronika IM - 01 T can be found in a number of collections and at least one has been sold on Ebay. It was manufactured in Russia in 1992. Elektronika, the brand name, is mainly associated with calculators, computers, watches and video games, many of them reverse engineered clones. IM stands for microprocessor game.

The manual is in Russian Cyrillic script, so hard work to interpret. However working through the functions it is clear that this is a more sophisicated machine than the other Russian offerings, with a wide range of options.

It has an integral power supply and a piece compartment at the rear. The original pieces would be smaller than those shown.

A later 1993 version of this chess computer the Elektronika IM-05 can be found at Sergei Frolov’s website (link).
 

Above left about to deliver checkmate to another Russian.
Bottom left there is a piece compartment at the rear which can instead be used for the power lead. As this needed a little attention I took the back off and had a look. However all the electronics are hidden by a shield. The PCB seems to give scope for expansion at the front?