This light works well with the Kindle Touch. It isn't too heavy or bulky. It has one light brightness setting (on/off). The battery required is a single AAA. This doesn't last as long as I would have liked. There is no optional AC adapter. The larger Mighty Bright has two light settings and an AC adapter option, I own that as well to use with hard cover books. The Mighty Bright has a snug fit and doesn't fall off or shift position unexpectedly. If the battery didn't have to be replaced so often, I would have given it 5 stars.