Bestway SaluSpa 54185 Owner's Manual page 6

NOTE: The warning label must be posted near your spa in a readable position
during using your spa.
Ambient Temperature Water Temperature
Be sure to cover the spa with the spa cover whenever the heating function is
activated. Leaving the spa uncovered will inrease the heating duration
required.
Please do not use the spa when ambient temperature is lower than 39°F.
For more information on APP matching, please go to www.bestwaycorp.com to find the instructions.Search and download the Bestway Smart
Hub App from the GooglePlay or Apple Store.
IMPORTANT !
Set Temperature Heating Duration