Equipped with professional grade sensors, the ThermoPro Digital Indoor/Outdoor Thermometer provides the most accurate measurements for indoor or outdoor humidity, temperature, and more. Highly accurate and user-friendly, the ThermoPro features a large, 4-inch backlight for easy reading at night and in dim light. In addition to displaying 24-hour/all-time, high/low records, and current trends for humidity and temperature, the thermometer comes with three remote sensors that let you track separate locations up to 200ft/60m away in real time. An advanced rechargeable lithium battery keeps your weatherproof thermometer operating in cold weather down to -31°F(-35°C). And its compact, sleek design and included tabletop stand, magnetic back, and wall hook lets you place the ThermoPro anywhere you like in your home.