Here is a smart lock box with Bluetooth that you can unlock with your phone. The LINKSTYLE MATRIX Smart Lock Box has 4 unlock options. You can use smart keys, password, your phone or fingerprint to gain access. It uses 4 AAA batteries that last up to a year. There is also a micro USB port for emergency use.
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This lock box has a zinc alloy body. It works in temperatures from -13 to 131F.
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