Temperature readings at your fingertips! The MiniThermometer liquid-damped thermometer attaches to your coat, pack, keychain, or wherever else you need it. The highly-accurate, Japanese-made dial thermometer reads from -20º to +120º Fahrenheit. Optical-grade clear acrylic housing. At just 0.4oz, the MiniThermometer is the lightest thermometer of its size. Ruler along sides measures in inches and centimeters—perfect for measuring map distances.