Configuration: I hastened to unpack and test it on my phone (Nokia Lumia 925). Recognition through the NFC is very easy. The device is so easy to pair with your téléphone.La instructions are almost non-existent but is useless; 5 seconds to set it up.
Oh, and before you configure your key ring, install the Nokia treasure tag application on your phone.
Features: The treasure tag has a removable rubber strap that acts keychain. It comes with a rubber strap without if you prefer not to use them in key ring (not really useful ??).
The treasure tag has a central button that, when pressed, makes your phone ring. You can also ring your door key from your phone. So far everything is nickel.
The downside is the detection range. First, pity we can not set the distance .... Who, for one, is still unknown to me.
Indeed, depending on their configuration, the detection varies. Therefore, your key ring, outdoors, will not ring unless a dozen meters or more. Indoors, if you change your room with your phone, but you do not take the Treasure tag, it rings every time with (less than 5 meters between two pieces).
Regarding ringtones, your phone rings and vibrates (if you wish). The key chain ring only. This ring is quite small when you provoke through your phone. By cons, if you walk away and no longer detects your phone, key ring sounds much louder.
Finally, the system of "location" of your treasure tag is not a gps. The map will show only the location (approximate) where your phone and key ring have ceased to be connected.
In conclusion, Nokia, has invented nothing compared to other devices that exist on the market or Android IOS. This treasure tag is nice, the design is not bad, but the detection quality was a bit disappointed. I do not regret my purchase, but it's still a little gadget that is not revolutionary.
Oh I forgot, I have the impression that the battery of my phone down a little faster than before as well.