Mobile devices have become an inseparable part of our everyday lives. We take them with us everywhere we go, and use them for most of our digital activity, from exchanging emails to taking pictures, working, and even paying bills and accessing our bank accounts and how to reset digital safe code.
Always remember to remove it. Never work I'm not perfect
I always take my Edge head unit & radar off the bike when it will be unattended.
Once only pairing
What if you decide to switch head units or sell a radar?
Such functionality is really limiting your rights, and also can me implemented incorrectly, and it might fail to pair the moment you really need it.
One other thing to consider, the first two iterations of the radar broadcast exclusively over ANT+ ... and ANY device can receive that communication. So there's really no way to lock the radar to a specific device.