I saw Richard Oliver using one of these in his shop- it was blue and white- didn't think much about it until I got my new dremel set and there it was- the blue and white one. It has two blue LED lights on the front that get brighter as the rpm is increased. This directs light right on the job you're doing. Seemed a little gimmicky at first but I've grown to like it very much. Recommended.
Dale Gleason