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LCD display: easy to read comfort display, digital temperature and humidity monitoring from Fahrenheit to Celsius. Memory - Maximum and minimum recording of the last 24 hours of temperature and humidity. Size - Indoor temperature range measurable from -10C (14F) to +50C (122F) and indoor humidity from 20% to 99%. Wide Applications Easily mounts to the wall and comes with a retractable bracket that can be placed on any flat surface. Batteries included - 2 AAA batteries included. : All marathon watches are covered with a limited of 2 years. › See more product details; Product description The MARATHON Comfort Index Thermo-Hygrometer displays the relative humidity and room temperature indoors.; Product description The MARATHON Comfort Index Thermo-Hygrometer displays the relative humidity and room temperature indoors.; The MARATHON Comfort Index Thermo-Hygrometer displays the relative humidity and room temperature indoors.