You can use this for your keys, wallet, purse, kids, your car, or any item you need to track. I have tried several trackers and this is by far my favorite. I have seen complaints about having to replace the tracker every 12 months, but for me the piece of mind is worth it. The average (depending on purchase price the average is about is $2 per month). The item needs to be within 200ft of your device. If it is out of range it will show you the last place it was tracked.
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By far this is the BEST tracker Ive had.