J-tech lightsaber 2921 J-tech lightsaber 2921 Ultra lightness has been designed for military/police/engineer/emergency/outdoor activities user. Small size, light weight is easy to carry. Lanyard system can be bought and attached to it. Water repellency. It has defensive bezel in the front, for defense or attacking purposes. There is a compass in the bottom. Specifications: Material: aircraft grade 6061 aluminum. Power in lumens: 169 lumens (lab notarized) Lamp type: halogen Battery type: 3v cr123a lithium x 3 (batteries not included) Length: 7 1/2 inches N. Weight: 270 g