NOTE: This Temperature Sensor needs to be used in conjunction with a zigbee gateway, such as SONOFF Zigbee bridge Pro, ZB Dongle-E, ZB Dongle-P SONOFF SNZB-02D Zigbee LCD Smart Temperature Humidity Sensor Remote Real-time monitoring SNZB-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 Refresh Built-in Swiss-made smart hygrometer sensor that gives you more accurate readings maintaining ±0.2°C/±0.4°F accuracy in temperature and ±2%RH accuracy in humidity, refreshes readings every 5 seconds. Large LCD screen display Use 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 notifications You’ll receive instant alerts from your phone when the temperature or humidity exceeds your set comfort level. Data Storage & Export Up 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. High Accuracy Built-in Swiss-made sensor ensures accurate measurement of room temperature and humidity. Data Storage & Export Up 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. Alert via APP You'll receive instant alerts from your phone when the temperature or humidity exceeds your set comfort level. Zigbee Standard Compatible Support zigbee gateways that use Zigbee 3.0 protocol, compatible with most hubs. Add to Home Assistant Add SONOFF devices to Home Assistant for your home automation through eWeLink add-on. 120m/400ft Coverage With up to 120m/400ft coverage (no obstruction and ideal conditions), let you check the latest data at any time. Works with Alexa and Google Home Just ask Alexa or Google Home and you'll know the temperature or humidity. Three Mounting Choices Durable stand, built to last no matter what type of installation. Smart Scene 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.