It was developed by the Nizhny Novgorod Research Institute of Radio Engineering (NNIIRT).

The 1L121-E can be mounted on a wide variety of vehicles including a BTR-80 and a GAZ Vodnik.

The 1L121-E gives full hemispheric coverage and is designed to function on the move or while stopped.

[1] Moving from stationary to mobile operation requires about two minutes.

It is mainly designed to detect and track airborne targets including low-level small UAVs.