Compact size for areas with limited wall space. Temperature compensated, fully adjustable aneroid movement with inch and
millibar scales. Calibrated for altitudes to 3,500 feet above sea
level. Maintenance-free, ultra-hard chrome finish guaranteed to NEVER tarnish. Patented Slide-n-lock™ Mounting System, no visible mounting screws, easy removal for adjustments. Beveled glass crystal. O-Ring seated behind glass for weatherproof construction. Lifetime warranty. US Patent #8,381,585 / #8,925,381.