Leapers Golden Image 38mm Red/Green Dot Sight, Integral Weaver Mount (SCP-RD40RGW) Quick-aim electronic dot sight with red and green dual illumination lets you quickly acquire and sight in on downrange targets Integrated Weaver mounting deck to easily affix scope to most weapons; flip-open lens cap also included 1X magnification; 38-millimeter tube diameter; 30-millimeter objective diameter; 16.5-foot field of view at 100 yards; 25-millimeter exit pupil Flexible eye relief; 0.5-inch click value at 100 yards; 119-millimeter total length; 7.4-ounce weight; runs on three-volt CR2032 batteries Includes limited lifetime manufacturer's warranty