Outstanding daytime brightness. Rock solid mount. Easy do it yourself installation in 5 minutes. Master override switch is recessed in laser body allowing for iron sights practice without laser turning on. Laser activates instantly as you grasp your pistol, no button to reach for in a stressful situation. All fingers are on the same level and without a bump on the front strap like Crimson Trace Laser Guard. Almost impossible to accidentally activate in your holster or pocket like mechanical switches can. Full control over laser, MOVE MIDDLE FINGER FORWARD TO TURN LASER OFF, GRASP PISTOL NORMALLY AGAIN TO TURN BACK ON. Extremely well crafted. Experience immediate laser activation as soon as you grasp your pistol. No buttons. Battery Door: Easy battery changes. Adjustable: Both windage and elevation. Battery: 1 commonly-found CR1/3N. Pulsing and steady beams. Material: DuPont Zytel FRN Polymer, Dot Visibility: 1/2" at 50 feet, Battery Life: Up to 2.3 hours, Output: Ultra-bright FDA Class IIIa Laser Product (Does not exceed Class IIIa emission limits), less than 5mW power output. Weight: 3/4 of an ounce with battery installed. Will NOT fit Bodyguard with integrated laser or Bodyguard revolver. Huge selection of ArmaLaser compatible IWB OWB Pocket holsters and accessories. Long-Range Laser Sight: Up to 100 yard daylight range and over 2 miles at night.