Easy to install: simple and elegant indoor hygrometer thermometer allows you to quickly detect the ambient temperature and humidity around you, embedded opening or fixed with double-sided tape.Mini, Durable and Portable. Measuring humidity and temperature indoor/outdoor. Fast response that measures every 10 seconds with 24 sensitive VENTS to provide updated and accurate readings.Measuring temperature range :-50 to 70(-58F~158F), Measurement temperature accuracy: +/-1(+/-2).Advanced temperature sensor keeps temperature measurement accuracy to 1F, Humidity measurement accuracy: 2%; Temperature measurement range: -58C-158F, Humidity measurement range: 10%-99%.Mini round digital humidity thermometer allows you to easily know the environment temperature and humidity. Mini, Durable and Portable enough for saving space and carrying around.Colour:blackMaterial:plasticPackage Contents:4 x Square Thermo-Hygrometer1 x Circular Thermo-HygrometerOnly the above package content, other products are not included.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.