Press to change the light mode while the device is in active mode.

Hold for 4 seconds to enter pairing mode (Pairing the Varia eRTL615 with Your Phone).

When the device is in smart sleep mode, hold for 2 seconds to wake the device.

When the device is in active mode, hold for 2 seconds to turn the tail light on or off. Radar remains turned on.

Hold for 10 seconds to reset the device.

Changes color based on the pairing status and device mode status (Varia eRTL615 Status LED).