LifeSpan SP-710 Owner's Manual page 20

c. If the countdown to 00:00 is not completed and there is no pulse signal, F6 will
show.
d. If you press the RECOVERY button prior to the countdown reaching 00:00, this
will end the function and no result will show.
NOTE
1. After being inactive for 4 minutes, the main screen will turn off and will display the clock
automatically.
2. If the computer displays abnormally, please re-install the battery and try again.
Battery Spec: 1.5V UM-4 or AAA (2PCS).
20
SP-710