I'm glad this. The candles all work and are very simple to use. Just push the On / Off button that is located below each candle. They work with round, flat batteries (CR 2032). There are still 24 so they remain profitable. This makes a lot so I'll offer a few. They are ideal for use outside in summer, it creates a nice atmosphere. For home too, but the effect is not very natural. They can be used for a bedroom, a living room decoration or around a bathtub. The lights flash just as does a flame, by cons it's still less relaxing than a real candle. But security is top side, no smoke, no risk of fire, and they do not heat. Against a little embarrassed by the smell of burnt they have (when I opened the box). Fortunately, they feel more after. We must put his nose to smell it. But as I have a baby, in doubt for now I prefer to use outside.