I am comparing [pet-door model] and would like [entry and exit states for pet A and pet B, using anonymous labels]. What identification method does this model use? Can entry and exit be controlled separately for each pet, or does it only support a shared directional state? Which functions can be confirmed from the manual, and which need checking with the manufacturer? Please answer using the information for the model I am considering. I will not send full microchip numbers in the initial enquiry.