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[anti-theft key finder]smart key tracker is a great little tool to remind you when you want to forget your belongings [portable and convenient]the smart key finder has a small design and is easy to carry. you can put it in your wallet as a wallet picker, or together with your phone as a phone picker or other item picker, bringing you convenience anytime, anywhere. [long battery life & stylish]bluetooth key tracking device is powered by cr2032 battery, with a standby time of more than 10 months, and can be easily replaced for long-term use..syi