Russia's little brother is smashing Azerbaijan with its military equipment while Armenia cries in the cuckshed

The services offered included modernizing older artillery equipment and providing new gear used for electronic warfare and drone systems.

state-of-the-art artillery targeting equipment for Azerbaijan as well as correspondence between the two states agreeing the purchase of Groza-S counter-drone mobile warfare stations for Azerbaijan's armed forces.

Groza-S doesn't look too intimidating but it's exactly the kind of thing they needed. Both sides were flooding the battlefield with drones.

https://www.politico.eu/article/leaked-documents-reveal-belarus-armed-azerbaijan-against-ally-armenia/

Of course the journo doesn't just tell you what the rest of the stuff is. He wouldn't understand so he assumes his readers couldn't either. This could be a lot of things. Whatever it is, if it helps the artillery it's worth it. The terrain there is very steep mountains so it's a lot more convenient to send a shell across to your enemy than to climb up his mountain.