I own a couple of the first generation
Chauvet
They're ok. I've used them non- line of sight, and they've worked, but also haven't worked over a shorter distance in a different venue. No idea why. Since I wasn't involved with sound,
etc. on either job I don't know what other wireless systems were in use or whether another wireless system was even responsible.
They have a new product.
Chauvet but I asked Chauvet if they were cross compatible several weeks ago with no response. I've not used the new product so I don't know if it's superior.
Yes, you can use multiple receivers to one transmitter.