A two-way bluetooth tracker that could locate both your car key and phone is the Cobra Tag sensor. Attach the Cobra Tag sensor to your keys, purse, laptop bag or any other item you want to protect from loss. The Cobra Tag sensor will communicate with a free application to be installed on your smartphone, and it will ring your phone up once it detects the left behind keys, purse or laptop bag.
Cobra Tag sensor also capable to lock your phone’s data once it when outside the predetermined range using the PhoneHalo application. Taking the shape elegant shape of a keychain, it cost approximately sixty bucks for owning one.