Grove - PIR Motion Sensor

I have a PIR motion sesnor version 1.1b
I’m curious about one of the Specifications
the Detecting angle: 120 degree
it means the sensing range is in front of the sensor? above the sensor?or both of them?
this is not clear in the specifications
thanks for your reply

It’s a angle of cone. Thanks for your attention,we will add this message to our wiki.