How frequently should I synchronize the EX5700 Controller clock, and what is the expected drift?

It is recommended to synchronize the Controller clock using the WanderGuard BLUE Manager once every 6 months due to clock drift. The clock has a maximum drift of 400 milliseconds per day, which equals a maximum drift of approximately 1 minute over a 5-month period. The clock has a battery that is used only when the Controller is not powered up. (Page 23)

From the official Stanley WanderGuard BLUE Tag Wandering Prevention System manual, page 23

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