The button on the right side of the frames is a switch with various functions.
If you hold the switch briefly when powering on, the LEDs on the frames above the lenses will blink blue to confirm that the power is on.
If you hold down the switch for three seconds or more when powering on, the LEDs will light up, then gradually fade.
If you hold down the switch for five seconds or more when the FUN'IKI Glasses are powering on, it will reset the settings for the FUN'IKI Glasses. You must reset the glasses before connecting to a new iPhone.
If you press the switch when the LEDs are blinking to give a FUN'IKI Glasses notification, you can stop the blinking.