Description: Mini Two-in-one Thermometer Hygrometer: Indoor outdoor thermometer can be used indoors, such as wall, table, refrigerator, door, freezer, incubator, greenhouse, breeding box, car, baby room etc. or as a measuring tool to carry outside and use outdoors. Hygrometer is suitable for almost any measuring scene Mini size: The thermometer is only 2 inches in diameter and weighs only a quarter of an ounce. The thermometer is the same size as the pocket watch, so you can easily take the hygrometer anywher Measuring Range: This hygrometer/thermometer accurately measures temperature and humidity simultaneously ranges between -20 and 120 F/-30 and 50 C to accommodate all climates, both Celsius and Fahrenheit are available; humidity range from 10 to 100%RH Automatic Calibration within 60 Minutes: This weather thermometer with a precision-made thermometer coil ensures accurate readings. This hygrometer uses a built-in automatic induction unit that enables real-time sensing, so you don't need to calibrate it and does not require a battery Unique Dial Design: The thermometer took the original needle and dial design. This thermometer stands apart from a digital thermometer and sets you and others apart Specification: Diameter: 2 inches Thickness: 0.5 inch Weight: 10g / 0.35oz Materials: aluminum alloy outer ring, glass mirror, aluminum dial and pointer Package Includes:(4 Pack) 1 Piece Mini Two-in-one Thermometer Hygrometer