The AcuRite digital window thermometer features accurate, reliable temperature readings. The bold, easy to read LCD screen displays the current temperature with daily high/low information and clock. Reversible design and durable, weather-resistant construction are perfect for indoor or outdoor use. Featuring solar and battery powered options, it includes a solar panel for when the sun is strong enough. When the sun sets, it uses its back-up battery to keep on working. Prepositional suction cup makes for an easy-mount thermometer.