A. TWO IN ONE: The mini digital hygrometer thermometer comes with a built - in probe. It functions as both an electronic thermometer and a hygrometer for measuring temperature and humidity indoors. B. WIDE TESTING RANGE: The temperature measuring range of the humidity meter is -58 - 158, and the humidity measuring range is 10% - 99%RH. C. HIGH PRECISION DISPLAY: The temperature measurement accuracy of the humidity meter is 2, and the humidity measurement accuracy is 5%RH. D. EASY TO INSTALL: This humidity meter gauge can help users know the current temperature and humidity. The embedded opening size is (1.81x1.06 inch). If the size is not appropriate, it can be fixed with double - sided tape. E. WIDELY USED: The indoor thermometer hygrometer is used in various places such as greenhouses, gardens, guitar cases, incubators, brooders, offices, cellars, fridges, closets, and any other places that require temperature and humidity level monitoring. F. Colour: black G. Material: ABS H. Size: about 48 x 28.5 x 15.6mm I. Package Contents: 6 x Digital Thermometers J. Only the above package content is included, and other products are not part of it. K. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1 - 3cm.