any time you have a hit, the lights on The underside flash and rotate for about 7 seconds, creating a sort of kaleidoscope glance—rather great! Fanbur Best choice for an ex-weighty smoker. I like the 9k puff Aloe Grape taste And that i use it all day very long. It lasts for a longer time than other disposable vapes and has no buttons. M Maddison