Remote Real-time monitoringSNZB-02D sensor will monitor the temperature and humidity in real time on the APP remotely or display screen, with up to 120m/400ft coverate. High Accuracy & 5s Fast RefreshBuilt-in Swiss-made smart hygrometer sensor that gives you more accurate readings maintaining 0.2C/0.4F accuracy in temperature and 2%RH accuracy in humidity, refreshes readings every 5 seconds. Large LCD screen displayUse large LCD display to view the real-time values of temperature humidity clearly and dynamically, the intuitive display icons let you check the room conditions and battery status even easier than ever. App notificationsYoull receive instant alerts from your phone when the temperature or humidity exceeds your set comfort level. Data Storage & ExportUp to half-year free cloud storage, and most accurate enough to view hourly data, you can also check the highest and lowest values at any hour or day and data can be exported as files. Specifications: SONOFF SNZB-02D is a Zigbee temperature and humidity sensor with 2.5 inch LCD display with large bold numbers that can work with Zigbee 3.0 gateways like SONOFF Zigbee Bridge Pro, SONOFF NSPanel Pro, SONOFF ZBDongle-P/E, Alexa with Built-in Zigbee Hub,etc to monitor your home's temperature and humidity for a comfortable life, and there are icons to indicate Hot/Cold/Dry/Wet air conditions, reminding you to adjust your humidifier or dehumidifier accordingly to achieve optimal comfort, also power icons for you to know the current power usage, the high accuracy built-in swiss-made sensor ensures accurate measurement of room temperature and humidity, the temperature is accurate up to 0.2 while the humidity is 2%RH, data is updated every 5s, always gives you the latest changes in the environment. The SNZB-02D sensor supports APP monitoring, you can not only check the current temperature & humidity on the LCD display, but also track the real-time and historic temperature or humidity data via the app on your phone, with up to 120m/400ft coverage (no obstructions and ideal conditions), you can check the latest data at any time, and once the temperature or humidity exceeds the preset range, you will receive an instant alert from the APP, you can view the temperature and humidity date by day, month, and year, the half-year curve graphs provide a clear data-changing track. you can export data as .CSV files, the temperature and humidity of the sensor can be set as triggers, such as setting the humidifier to turn on when the humidity is less than 40%, adjusting to the comfort temperature and humidity at any time for your health, it works with Alexa and Google Home, just ask Alexa or Google Home and you'll know the temperature or humidity. The sensor supports 3 mounting methods - tabletop atand / magnetic back / 3M adhesive, just place the sensor anywhere you wish such as living room, baby room, kitchen, greenhouse, guitar room, reptiles terrarium, humidor, cellar or incubator to monitor temperature and humidity remotely. Package Included: 1* Humidity Sensor 1*Manual