A nasty and characterful drone machine – a recreation of the somewhat mythical Grendel Drone Commander. YouTube has all the info you need – look for the OG ammo can version. It syncs to host eg AUM and the LFOs run in sync when the transport is running. It has different oscillators to try, and has reverb and delay should you require it.
RTFM on the original;
https://www.manualslib.com/manual/1612902/Rare-Waves-Grendel-Drone-Commander.html#manual