Leveraging years of experience blending innovative electronic technologies with rugged optical systems SIG SAUER's new ECHO thermal category provides a comprehensive spectrum of performance-driven optics to deliver the innovation and quality that has become synonymous with the Sig Sauer name. - The ECHO SV Thermal Sight streamlines the shooting process eliminating the need for additional devices charts and formulas improving your performance with startling precision. - Switch between profiles seamlessly while accessing all the information you need with an integrated 1000yd laser rangefinder and onboard environmental sensors. The ECHO SV Sight provides you with leading-edge capabilities enabling you to surpass limitations and truly see all of your environment. - FEATURES: - LWIR 640x512 VGA 12um 50Hz thermal core with ?20mK sensitivity - Record still photos and video with audio - BDX 2.0 enabled including Applied Ballistics Ultralight with complete AB bullet database and live video streaming - Integrated 1000yd laser rangefinder - Rechargeable and removeable 18650 lithium-ion batteries with 11-hour runtime on a single charge - Configure settings and download media with the BDX App - Cantilevered picatinny rail mount - Specification - Height 3.5 in [88mm] - Overall Length 10.7 in [273 mm] - Overall Width 4.0 in [88 mm] - Illumination Settings 8 Selectable Color Palettes - Run Time 11+ Hours - Color Black - Battery (2) 18650 or (4) CR123A