Hi i'm wondering if there's any health concerns about being next to these bluetooth devices often.

2 questions:

1. Do the devices still put out/recieve bluetooth signals even when they are not being used? Or do they only do that when the keyboard or trackpad has been touched and it says connected on the mac?

2. Is there any reasons for concern about being close to these devices? HOW about when my body is in between the Mac and the device... does that make it worse?

Thanks, Dan