Ok. I just bought this adapter today for my PDA cellphone. The product integrates well with everything (My Laptop - sony vaio, cellphone (siemens sx56, my panasonic cordless home phone (although with the panasonic, ppl complain about my voice being faint)). But the issue is , I hear static crackling noises even if I'm not in a call. As soon as my bluetooth headset is connected to the a210 adapter, it produces faint-medium crackling noise. The noise is exactly like the one it produces when you move out of range. But happens even at 1-2 feet distance. I was initially confused on what is producing this. The battery was fully charged on the adapter. The bluetooth headset is not the issue, as it connects well with my laptop (which has integrated bluetooth). Then I figured, if I keep the adapter and phone closer (few inches away from my ear) to my headset, then everything works well. Otherwise even at a distance of 2-3 feet , it starts the crackling. I even switched modes (1,2,3) on the adapter and still the same issue. Although it works upto 20-25 feet, the crackling starts at a distance of 2 feet. I even turned off my wireless networks to test this. Also exchanged it for a new one, to see if it was a item specific issue. But even the 2nd one is having the same problem. The manual says, that it is due to interference. I think many 2.4 Ghz can cause this inteference. Alhtough I turned off all of my wireles devices, it still caused the issue even in my car (slightly better, but not totally gone).But in any case if you don't hear the crackling, it integrates very well with everything. The crackling is heard only by you, not by the person on the other side. So we can probably live with it. There are not many bluetooth adapters that are available out there.Note: Many reviewers here complain about this adpater not working well with home phones. First of all, if you read the manual, this is not designed to work with home phones (if it works well with home phones, then you're lucky). It is designed to work primarily for mobile phones only.