I've an 6442S model Drives two heads, and has the RTlink port that can connect to adapter to allow remote control. Other than that, I have no idea. I'd probably not pay extra for controller plus the remote unless you wanted it.
and I'm kind of hesitant on 'open' box. Esp from China...
Woodworking, Old Tools and Shooting
Ray Fine RF-1390 Laser Ray Fine 20watt Fiber Laser
SFX 50 Watt Fiber Laser
PM2000, Delta BS, Delta sander, Powermatic 50 jointer,
Powermatic 100-12 planer, Rockwell 15-126 radial drill press
Rockwell 46-450 lathe, and 2 Walker Turner RA1100 radial saws
Jet JWS18, bandsaw Carbide Create CNC, RIA 22TCM 1911s and others