this review title is: i have an older version from the same company buttons that was a lot better and the content is: the older version buttons it had a red green off light to define off constantly on or intermittent the light button would cycle through the lights to select any of them and or rotate through them very simple and it worked good this one has a sleep button that does not seem to do anything and its either constantly on or off no light to let you knowone other thing the old one turned the light off when it was empty and this one stays on even when empty buy the old one if you can this one cost more and it sucks.there are other information for this review, one is this reviewer did purchase it and the other is 12 people think this review is helpful.