BRIGHT BLUE LASER SIGHTS] Precision BLUE laser beam intensity/wavelength: <4 mW peak, 450nm. Which is the Class IIIa and meets US FDA Safety Requirements

Robust Construction: Crafted with heavy-duty Military Aircraft Grade Aluminum, this piece of gear is as tough as it gets. The non-rust black matte finish ensures maximum corrosion resistance, and guarantees you'll maintain control even in the most demanding situations

Blue laser sight has two modes of outputs, steady and strobe. To change from steady to strobe, press and hold the switch button for a second, and verse visa

The unit body is extremely low profile, and it is holster friendly.  Both LED flashlight and Blue Laser are powered by a built-in rechargeable battery, which is charged with a micro-B USB port plug, include

LxWxH: 1.8" x 1" x 0.625"; Weight: 2.3oz. The unit is made of hard anodized aircraft grade aluminum, which is light in weight but strong to endure all kinds of harsh environment. In order to install this unit, the Clear Space (please refer to picture) of your pistol should be at least 19mm (.74”)