Smart Swim 1

When your goggles are charging, there are two LEDs near the contact point that should show red until the goggles are fully charged, at which time they will show green. If the LEDs do not come on, but the goggles are successfully charging, you can perform a reset by holding the FRONT button for 20 seconds.

Smart Swim 2 & Smart Swim 2 PRO

When your goggles are charging, there is one LED at the back of the unit that should show red until the goggles are fully charged, at which time they will show green. If the LED does not come on, but the goggles are successfully charging, you can perform a reset by holding the FRONT button for 20 seconds.