External Receiver (SRX)
WARNING: This page is about a different car, the 2015 Kia Optima. However, it is still accessible from the selected car via links, so may be relevant.
The data transmitted by the RKE or Smart key Fob is received by an external RF receiver called as SRX. This receiver will be same as that one for the SMK applications, with respect to electronics, housing, connector and software.
This receiver is connected to the SMK via a serial communication line.