DetailsGet an instant weather report and direction at your fingertips with the Therm-o-compass! Attaches to your coat, pack, keychain, or wherever else you need it. Luminous, liquid-filled compass allows you to determine direction even in low light conditions. Reads down to -20º Fahrenheit (-30º Celsius) and includes a wind chill chart, making it a perfect compliment for camping and hiking gear. Solid brass split ring won’t affect compass reading.