ASP Introduces an advanced technology to personal lighting products. It is bright, reliable and conveniently clipped. The Sapphire Crystal produces a high efficiency, non-deteriorating, solid state beam. It provides soft illumination with a 180 degree viewing radius that is visible over one mile. The Crystal and battery has a lifetime replacement. Injection Molded Xenoy Frame. Auto Tension Tri-Ring Clip Forged Aluminum Body. Softtouch pressure switch.