Bluetooth Lock Boxes User Guide
FIRMWARE UPDATES
To ensure your Master Lock Bluetooth Lock Box has the most up to date firmware, please follow the
steps outlined below:
BATTERY
Q: What type of battery is used in a Master Lock Bluetooth Lock Box?
A: Master Lock Bluetooth Lock Boxes come installed with a C123A lithium battery. For optimal
performance, Master Lock recommends the use of high-quality, name branded, batteries with an
expiration date of 8-10 years from the current year. Generic batteries often do not have the lifespan
needed to support long term usage.
Q: How long will the battery last in my Bluetooth lock box?
A: The battery should last at least 2 years with normal usage.
Q: What if my battery dies?
A: If the battery dies while the lock box is closed, it can be unlocked using an external battery.
1. If battery dies in locked position, locate battery jump contacts on the bottom of the lock box.
2. Hold a new 9-volt battery underneath the lock box with the positive (+) and negative (-)
terminals pressed against the jump contacts.
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