When the total weight of your gear is critical, keep your options open for long-distance viewing with the help of this lightweight, waterproof, pocket-sized piece. With the Vortex Doubler you can increase the magnification of any full size Vortex binocular (except the Kaibab) as well as the Recon R/T and Recon Mountain scopes. Take in high-power views more similar to what you'd see through a spotting scope. The Vortex 2x Doubler easily attaches over most Vortex binocular eyecups. Backed by Vortex VIP Unconditional Lifetime Warranty