HD Optical System delivers exceptional resolution, cuts chromatic aberration, and provides outstanding color fidelity, edge-to-edge sharpness, and light transmission; Premium anti-reflective XR Lens coatings on all air-to-glass surfaces for superior light transmission for exceptional clarity and low-light performance; Increment Display - .1 yd increments out to 999.9 yards; Scan displays continuous distance readings while panning across a landscape; HCD angle-compensated ranging, providing bow and rifle shooters with precise distance data for accurate, confidence-boosting shots; ArmorTek: Ultra-hard exterior lens coatings defend against scratches, oil, and dirt; Waterproof - Designed to withstand harsh weather conditions; Shockproof - Designed to withstand impact; Powered by 1 CR2 battery. The unit has an automatic shutoff feature for extended battery life; The combo (LRF-CF1400+hat) also includes a Vortex Men's Flexfit Charcoal Cap in size L/XL (7 1/8" - 7 5/8")