The NcSTAR 1x 42 mm B-Style Red Dot Sight (Ruby Lens) has seven-position rheostat knobs for multiple brightness settings and integrated weaver style mount. It is powered by a 3-volt lithium battery (CR2032).
NcSTAR DBB142 Features
LED (Light Emitting diode) 100% safe for the eyes
Black Anodized aluminum body
Unlimited eye relief and field of view
Export of this product outside of the United States of America is not allowed and is controlled by the US Department of State