TWO IN ONE: The mini digital hygrometer thermometer with built-in probe, electronic thermometer and hygrometer for measuring temperature and humidity for indoor use.<br> WIDE TESTING RANGE: Humidity meters measuring range: -58-158 , humidity measuring range: 10%-99%RH.<br> HIGH PRECISION DISPLAY: Humidity Meter measurement accuracy: 2, humidity measurement accuracy: 5%RH.<br> EASY TO INSTALL: Our humidity meters gauge can help you to konw the current temperature and humidity, embedded opening size (1.81x1.06 inch) . If the size is not suitable, it can be fixed with double-sided tape.<br> WIDELY USED: The indoor thermometer hygrometer widely use in greenhouse, garden, guitar case, incubators, brooders, office, cellar, fridge, closet any other place that requires monitoring of temperature and humidity levels.<br> Colour:black<br> Material:ABS<br> Size:about 48 x 28.5 x 15.6mm<br> Package Contents:<br> 6 x Digital Thermometers<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.