Smart Notification: Set the temperature and humidity range in the app, once exceeded, the APP will send a warning notification immediately. Create a comfortable environment for your home, pets and greenhouse.Please Note: After switching C/F in APP, you need to press the sensor black button once to wake up the device and the switch takes effect.Hygrometer Parameters: Temperature measurement range -9.9~60 (14F~140F), accuracy 1. Humidity range 0%~100%RH, accuracy 5%RH. Smart Life app supports temperature and humidity calibration. Built-in 2 AAA batteries, support WiFi 2.4GHz.Smart APP Remote Monitoring: Smart thermometer is compatible with Smart Life and Tuya Smart APPs, record hourly/daily/monthly/yearly data, data support export email. Meanwhile, APP supports temperature and humidity data calibration, no need to worry about errors. APP support device sharing with family members.Support Voice: You can query the ambient temperature and humidity through Alexa, Google Assistant smart speaker voice dialogue. For example "Alexa, what is the temperature of the 'device name".Compact and Durable: Indoor thermometer has a simple and compact design with a lanyard and sticker attached. With low power consumption, it has a life span of at least 2 years, no need to change the battery frequently. White and black colours are available for you to choose.