I can honestly say, I have no idea why I bought 10 of these 433Mhz receivers (HC12?), and 5 of these Transmitters (FS1000A).....
They are OOK/ASK. I found them in a box that has been in storage for years. The thing is I already have a bunch of these modules, and I don't use them. So I have no idea why I would buy more.

#Arduino #RXTX #433Mhz #FS1000A #HC12 #OOK #ASK