HOKCO Weather Station - Analog - Barometer - Thermometer - Hygrometer - Aluminum Rugged Anodized Aluminum Housing with 3 Analog Weather Instruments Accurate Weather Forecasting Aneroid Barometer, Thermometer, Hygrometer to Measure Humidity Maximum altitude for barometer operation is 3,800 ft. above sea level Length: 8.25 in., Width: 5.25 in., Depth: 1.5 in.