This is a lot smaller then it looks in the picture, which is great. It is about the size of a USB thumb drive. It has 6 L.E.D, which produces a white light, not blue as pictured in the photo gallery. I used this on my motorcycle, facing forward as a tag light. Not only does it light up the tag but it lights up the entire rear of the bike switch is an added safety feature for night riding. So far I have not experienced any issues with rain, water, mud or dirt getting into it. The construction/ build quality is top notch. If I have any issues I will update this review.