Audible "clicks" when zeroing the optic. The dot brightness intensity switch is a digital? Keypad with intuitive buttons that can easily be manipulated while wearing gloves.The pressure forged aluminum alloy housing provides durability against extreme abuse and drastic temperature changes. The sight is vibration and shock resistant and submersible up to 80 feet. It is powered by a single CR2032 battery and ACET technology provides over 3 years of constant-on use at daylight position 7. The Duty RDS comes with a one-piece torsion nut mount and the optic features flip-up lens covers - the front is solid and the rear transparent. 2 MOA red dot for precision and fast target acquisition. Battery life: 30,000 hours (over 3 years) of constant operation with one battery on setting 7. Battery type: CR2032 battery (included). Flip-up lens covers - front is solid, and rear is transparent. Advanced optical lenses for enhanced light transmission and ultimate dot clarity. Windage and elevation adjustments are flush mounted and waterproof - eliminating the need for protective caps. 10 brightness settings: 1 off position, 4 night vision compatible settings, and 6 daylight settings. 1X (non-magnifying) operationally parallax free optic. Submersible to 80 feet (25 meters). Temperature span -49°F to +160°F. Weight 3.8 oz / 108 g (sight only). Length x Width x Height 2.7 x 1.5 x 1.7 in / 68 x 37 x 43 mm. This item is in the category "Sporting Goods\Hunting\Scopes, Optics & Lasers\Red Dot & Laser". The seller is "aimpoint_inc" and is located in this country: US. This item can be shipped to United States.