The AimpointA(R) Duty RDSA(R) MR is a compact and rugged reflex sight featuring Aimpoint's new multi-reticle system. Built to withstand the demands of law enforcement - the DUTY RDS MR offers selectable reticles of 2 MOA dot, 65 MOA circle and combination. The reticle can be adapted to the mission giving shooters rapid target acquisition at close range and precise aiming at distance - all in one optic. Elevation and windage turrets provide tactile, audible clicks for precise zeroing. The push buttons allows easy adjustment of brightness settings while the flush-mounted design prevents accidental changes in the field.3 Selectable Reticle Modes: (1) dot, (2) dot and circle or (3) circleBattery life: 30,000 hours (over 3 years) of constant operation with one battery on setting 7, mode 1 red dot onlyBattery type: CR2032 battery (included)One-piece Torsion Nut MountFlip-up lens covers - front is solid, and rear is transparentRecessed lenses and rugged housing protect optics from impact and debris.Side-loading battery, tactile controls, and compact footprint.Pressure-forged aluminum housing.12 brightness settings: 1 off position, 4 night vision compatible settings, and 8 daylight settingsInstant-on motion activation, the sight starts instantly when motion is detected1X (non-magnifying) operationally parallax free opticSubmersible to 80 feet (25 meters)Temperature span -51AdegF to +160AdegFWeight 3.9 oz / 110 g (sight only)Length x Width x Height 2.7 x 1.5 x 1.7 in / 68 x 37 x 43 mm