Leviton triple switchNutone P66VNutone looks like an ordinary three-switch combo being marketed as a bathroom 'fan switch.'
The screws on the device would tell the story.
Look at the Leviton screws:
The switch has dark-colored screw on one side >> the hot from breaker always connects to dark screws.
Other side of switch has 3 silver-colored screws, but these can be brass colored screws > the wires to fan light and heater connect to each of these screws.
Most likely the Nutone switch is identical to the LevitonI say this because the descriptor on Amazon describes it as a 'fan' switch.
It's being marketed as a bathroom fan-light combo switch >>> so it looks like an ordinary three-combo switch