Attach TrackR to keys, wallets and more. When an item goes missing, just tap the TrackR app to make your Bluetooth tracker ring loudly.
If you're looking for GPS capabilities, the initial costs can be high but you'll also be paying a (monthly) recurring fee for GSM/cellular data. The return on spend may be justified on a larger bird but probably not the Tello, IMO. Your $$ to spend. Caveat emptor.
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