Why doesn the part number on the Kannad 406AF-Compact ELT unit I received match the label on the box?
The actual part number for the 406AF-Compact ELT unit is S1840501-01. Part number S1840501-03 indicated on the label on the outside of the box is the system part number which includes the ELT unit, remote switch, and installation hardware. Located inside the box is an “Item List” which details the contents inside the box.