This is a clip-on LED light that runs on 2 coin batteries (CR2032). The light rotates 360 degrees and it has an on/off switch. This light goes anywhere: hat brim, home & hobby, plumbing, fishing, camping, reading in bed, etc.
Item weighs 1.4 ounces in the original, unopened package. Package measures 4.3" x 2.7" x 1.8".