The Wempe Cup series consists of a porthole ship's clock with battery-powered quartz movement, a barometer, and a comfortmeter. Available in polished and lacquered brass or chrome-plated. Specifications Instrument: Comfortmeter, Thermometer, Hygrometer Size of clock face: White clock face with black numerals Material: Brass Scale: Temperature in °C/°F, Humidity level in % Design of clock face: White clock face with black numerals Hygrometer - Accuracy: +/- 3% between 40 - 90 %' Hygrometer - Humidity sensor: Synthetic fibre Hygrometer - Measuring range: 20 to 100 % Hygrometer - Range of operating temperature: -10 to +50 °C' Thermometer - Accuracy: +/- 1°C between 0 - 40°C' Thermometer - Measuring range: 40 to 100 °F Thermometer - Temperature sensor: Bi-metal About Wempe "Leisure sailors worldwide rely on the quality and precision of their instruments and many famous cruise liners, mega yachts and German and international cargo, research and navy vessels are equipped with Wempe clock systems.Wempes devotion to their fascination of sailing and the exacting task of manufacturing precise maritime instruments, and nautical timekeeping systems, is why they are the market leader and pioneer in developing and creating new products."