Arista Mixers

Any info?

Does anyone have any links, manuals, info (circuit diagrames) about Arista Mixers? I’ve bought a small battery operated 4 channel one (mm1) and recenty, pure coincidence, a larger mains powered model, labled mm5 . Searches bring many sites, but none about the Arista I mean. Is this a brand that just stuck its name on generic circuitry?