Mercury free, this environmentally friendly Min-Max Thermometer features a classic dual Fahrenheit and centigrade scale displaying the current temperature and a digital display tracking the lowest and highest registered temperatures within a given period. Suitable for indoor & outdoor use free standing or hanging. Mercury free with dual Range -40 to 120°F, (-40 to 50°C) • Length 8", Div. 2°F and 1°C. • Current temperature displayed in °F and °C on the spirit filled sticks • Min. and Max. in °F and °C on the digital read out