Great product that fits on my phone just perfect. It takes two AAA batteries and has an on/off button which provides you with three levels of lighting. It gives a nice even light without the harsh flash. It works even better for video calls. It easily clips onto your phone and holds secure in place. Obviously it's a light so it could come in handy to use in other situations as well. I purchased this product at a discounted price and am very happy with it. I would recommend it to anyone who takes selfie pics and knows how poor lighting ruins so many shots. 

(After a few months with this, I upped the rating to 4* from 3. I like it a lot; not perfect, but a very useful bag)