This Truglo Crossbow Red Dot Sight has click adjustments for windage and elevation for the ultimate in accuracy. Features include a rheostat for brightness control and an integrated Weaver-style mounting system. The 3-dot reticle targets precisely, while affording the shooter a wide field of view and unlimited eye relief. Waterproof, fogproof, and shockproof, this sight can take heavy use and the elements. A limited lifetime warranty backs this sight, so you can rest assured it is made to last.