Quote Originally Posted by Yellowcab View Post
905nm is in the infrared spectrum which produces what we sense as heat. This is how in the dark infrared sensors can image heat containing objects. As explained above because the ALP is a parking sensor and is always active at low power, the heads are always producing heat. That is one of the reasons brute force jammer can only operate for a short period of time.
On a good note I can see two benefits from this:

1. If someone asks what they are you can really tell them parking sensors and tell them to go and block a sensor and they will hear the alert go off
2. If you are in a cold climate you do not have to worry about snow and ice building up on the heads and rendering them useless