Two analog scales display air pressure readings in either millibar (mbar) or inches Hg. Barometer is encased in a corrosion-resistant plastic housing. Digital temperature display is switchable between °F/° with 0.1° resolution. Includes convenient wall mounting bracket, one AA battery and instructions. Dimensions: 5.3" dia. x 1.3"D. Shpg wt 1.0 lb.