 remote that serves as a visual proof of concept of the hybrid PLC technology. The main components of this demo are those two eval kits. So this one is the data concentrator and this one is the device which can be a meter for example. They are communicating via this PLC connection that you can see here and there's the PLC attenuator here to simulate a noisy connection. They're also communicating through RF via this attenuator here that's going to the S2LP and to the antenna and there's the other S2LP board here that you can see. Right now they're communicating in PLC you can see it's written here and here and this is called the link quality indicator and you can see when I increase the attenuation value that's the link quality indicator diminishes and if I eat a certain threshold for example ATDB it switches to RF and then you can see it's RF. Whenever there's a switch in this little chaser here it means that there's an exchange between this board and this board and let's reset the PLC attenuator to zero. So you can see the communication still is in RF and doesn't go back to PLC because the communication in RF is pretty good but if we increase the attenuation value of the RF attenuator you can see the link quality indicator goes a bit down and as before if it reaches a certain threshold then everything is going to switch back to PLC after a few attempts.