This is a very compact barograph and exceptionally well finished inside and out. Hardware is solid brass and features four chrome-plated aneroid cells and quartz drive. A AA battery, felt tip pen and charts in inches or millibars are included. Dimensions: 7 3/4 x 5 x 5 inches When you have only a small space for a barograph, the Cadet should be your choice. The nicely proportioned mahogany cabinet measures 7-3/4"W x 5"D x 5-3/4"H. A highly polished folding brass carry handle adorns the hinged top. Inside, on a polished brass platform, sits the battery-powered, 7-day chart drum and four chromed aneroid cells. A felt pen gives sharp pressure traces on the chart in your choice of inches (28.6-31.2 in.) or millibars (960-1050 mb). This barograph comes ready to run with a "AA" battery, felt pen and years's supply of charts. On your desk, on the mantel, or in a bookshlef, the Cadet will suit any location in your home or office.