Inovelli 4 n 1 Sensor

Just installed the sensor, it turns on the lights, however, only at a distance of 6 ft if I wave my arms.
Sensitivity set at 10. Do I have a defective unit or do I need to change anything more in settings ?

How high do you have the sensor mounted, and do you have the holes pointed down?

5 ft high and holes pointed up.

@Iceman