Affordable wide view electronic reflex red dot sight • Fits onto 3/8″ dovetail rails or groove receivers, or Weaver rails with included Weaver side plate installed • Fully adjustable for windage and elevation • On/Off switch • Eye relief: Unlimited • Dot size: 5 MOA • Sight overall length: 4 1/2″ • Center height(line of sight): approximately 35mm • Battery used: CR2032 button cell ( included) • Accessories included: Weaver rail side plates