A&D UA-651BLE Instruction Manual page 11

Communication distance
The communication distance between this monitor and the receiver device is
about 10 m.
This distance is reduced by the conditions in the surrounding environment,
so be sure to check that the distance is short enough for a connection to be
made after measurement is complete.
Transmitting temporarily stored data
In cases when the receiver device cannot receive measurement data, the
measurement data is temporarily stored in the monitor memory. The data
stored in the memory is transmitted the next time a connection is
successfully made to the receiver device
A total of 30 sets of measurement data can be stored. When the amount of
data exceeds 30 sets, the oldest data is deleted and the new data is stored.
The amount of data that can be stored temporarily may vary with the
application.
Time
This monitor has a built-in clock. The date and time that a measurement was
taken is included in the measurement data.
The built-in clock is designed to be automatically adjusted by syncing with
the clock of a receiver device. Refer to the specifications of the receiver
device.
This monitor has no clock adjustment function.
Using the Monitor
English 10