The OTAL-A series is the "advanced" generation of the OTAL-C that has served reliably in the harshest conditions. The OTAL-A features an offset laser module that allows it to be mounted at the 12 o'clock position on an AR-15 weapon system with a standard front sight base. The laser is offset just enough to clear the front sight base. Equipped with visible green laser that will range out to 750 meters. Integrated Activation Switch Visible Laser or IR Laser High Power (LE/MIL-only) and Low Power (Eye Safe) Models Available Powered by: One CR 123A Battery Quick Release HT Mount Fully Adjustable Windage / Elevation Remote Cable Port Activation / Mode Switch Specifications Wavelength - Visible Green Laser 532 nm Beam Divergence - Visible Red or Green Laser Range/Visibility (Night/Day)* - Visible Green Laser 750 m / 15 m Temperature -0Adeg C to +55Adeg C Battery CR 123A Battery Life (mode dependent) > 3 hours Material Aircraft Aluminum Color Black Weight (with battery) 6.0 oz. Dimensions 3.8 (L) x 1.8 (W) x 1.45 (H) Waterproof Submersible to 5 m Mount QD HT Mount Windage and Elevation Adjustment Yes Activation Switch Integrated Push Button Remote Cable Pressure Pad Yes Warranty 3 Years Special Features Low Profile for Mounting in front of scopes, holographic or NV sights