The STEELMAN 42-inch Lighted Inspection Tool has a Lighted Mirror. The Flexible Shaft makes it super easy to see into those hard to get to places. Convenient thumb wheel control let's you keep an eye on your work while controlling the mirror. The mirror itself is 4-power magnified with a 90 degree flexible mirror . This is definitely the tool use in those difficult to reach areas. The tool runs on two (2) AA Batteries which are included. Specs are as follows : 27.5 inch x 5 inch x 1.5 inch and the weight is 0.850 lbs. Replacement Bulb: STEELMAN Part Number 05515.