Epson ProSense 17 User Manual page 26

Your watch displays a code number you will use for pairing.
4. Start the Epson View app on your smartphone and select Pairing.
Note the code that appears on your watch.
5. Select your product from the list on your smartphone, then follow the instructions to pair your watch
and your phone.
When your watch and smartphone are successfully paired, you see a
of the Time screen on your watch. (If the
ProSense 17
ProSense 57
icon is flashing, pairing is not completed.)
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Bluetooth icon at the bottom