I believe almost all devices called motion detectors use PIR technology. Some of the higher end ones also add some sort of wireless technology to reduce false alarms. What I learned the hard way was: Motion detectors are unreliable, and wireless is unreliable.
Motion detector issues:
(1) Too many false positives from deer, rabbits, squirrels, chipmunks, etc.
(2) Cars and people that are close to ambient temperature can slide right through without detection.
My solution: A magnetic driveway sensor. It's not perfect, sometimes getting a false positive from a large or fast-moving vehicle on the nearby road. And a high aluminum content or very slow vehicle can slip through it. Animals and people never set it off. Despite its flaws, the false positive and missed detection rate is vastly better than a PIR motion detector.
Wireless issues:
Maximum range "xxx-feet". Maybe if you're in the open desert. I first tried a ~150 foot span, well within the rated maximum of the transmitter I was using. The failure rate was almost 100%. I then mounted the transmitter about 20' from the house and ran a wire from the sensor to the transmitter. Reliability rate went up to maybe 60%. Final solution: The wireless transmitter is in the house, about 20' from the receiver, now running at 100% reliability. I have the trigger hooked to an NVR alarm input to trigger recording on a few of the cameras.