PEI-4 Indication for use: All internal environments of the house
PEI-5 Indication for use: All the home and outdoors
PEI-5 Indication for use: External environments
PEI-3 Indication for use: Internal environments of the house without leaving out
PEI-2 Indication for use: Internal environments of the house
PEI-4 Indication for use: Internal and external environments
PEI-3 Indication for use: External envarionments without exit out