High temperature and temperature alarm: Once set temperature is exceeded, the phone will prompt an alarm voice control:Works with Third-Party Smart Speake Support inquiring the indoor temperature and humidity via voice commands through Alexa speaker. Temperature Unit Switch:You can switch temperature unit between Celsius and Fahrenheit in the set, then press the reset button once, temperature unit will switch. Intelligent linkage:The WiFi temperature and humidity sensor can be linked with smart devices in the house to improve the indoor heating and cooling, and make your home more comfortable. installation methods: can be placed directly the table or glued to the wall. Without a data cable, it's more convenient and beautiful Temperature measurement range: -10-60 (℃) Humidity measurement accuracy: ± 5% (RH) Temperature measurement accuracy: ± 0.5 (℃) Humidity measurement range: 0% RH-99% (RH) APP:cozylife Colour:White Material:plastic Size:8x3.65x2.55cm Package Contents: 4 x Temperature And Humidity Sensor 4 x English instruction manual Only 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.