Holosun ARO & HM3X Combo Kit ARO-RD2 & HM3X w/Hard CaseHolosun ARO & HM3X Combo Kit ARO RD2 & HM3X w Hard Case ARO enclosed red dot sight with 22mm housing; 2 MOA red dot reticle for precision aiming; 12 brightness settings (10 daylight, 2 night vision compatible); Shake Awake technology with last setting recall; 0. 5 MOA adjustment per click; 50 MOA windage and elevation travel range; Runs on one CR2032 battery with up to 50,000 hour life; Matte black aluminum housing with durable finish; IP67 rated