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When the product is out of the distance(from about 5-20 meters, which you can set on the mobile) with your mobile, both of the product will be alarm.
You can use the product to find where is your mobile and you can also use the mobile to find your things which together with the product.
Our software with google or Amap, which will show the location of product and record the product losting history, so that you can know from where you lost your things
