Details:
Already, you need a compatible phone Bluetooth 4.0: I used it with Xperia Z and Note II (2 in 4.3) without any problems.
Then, the principle is to measure the power of the BT radio signal (hence a bit exaggerated the "radar"), that's why it works inside buildings and the price is low (I I bought $ 49 in the US).
I use it for my keys (key stuck to the door) and my cat (stuck on the medal) for 1 year and I am satisfied.
Outside, the reach is 30m, so it's ideal to find kitty in the bushes, especially if it is possible to ring the badge (not hard) and light a LED (light little unfortunately).
Indoors, the signal strength depends on the walls so it's not always easy to find the key: you have to walk at random in different parts, by ringing the badge rather than use the power to see if we approaches or not.
The Android app is simple but functional, it allows to update the sticker when needed.
Attention those who are installed before the end of 2014 must reinstall the update for Google Play vien is not done automatically.
It offers interesting modes such as fashion "leaves" that triggers an alarm when the badge of the signal falls below a threshold, or come back into range.
However, signal strength depends a lot on the environment, if you put the phone in a bag or purse beside, so let mode is a fairly limited use.
The "map positioning" is used to indicate where the sticker was the last time the phone was detected. So we can know if we forgot his keys at work.
In this case, it is the phone's GPS is used ... provided that their GPS is on and it picks!
For this function, create an account, and suddenly all phones connected to receive account information.
Side autonomy, it is announced to 7 months, it is better to change the batteries every 3 months to maintain sufficient scope.
Furthermore, to obtain an object as small, the manufacturer opted for a CR2016 battery, unlike the competition (CR2032), therefore the autonomy suffers.
The battery replacement must be done carefully because the thin plastic case is very fragile: slide your fingernail into the notch and go around to open it gently (no screwdriver!).
I am satisfied with this product, although I admit that indoor use, it quickly out of reach and that in this case it is not possible to make it sound ...
