Where is the ir sensors located

[streetkilln]

I cant seem to find the sensors on the moto x i could clearly see it the red light stands out. Im wondering why i cant find it on the z play maybe its not ir?

 

[Clocks]

The Z Play uses the same proximity sensor to trigger moto display and that keeps the screen off when you have the phone to your ear. It's to the right of the top speaker.