SPECIFICATIONS Communication method: zigbee Compatibility: All Compatible Model Number: Smart Temperature Humidity Sensor Type: SONOFF LCD Temperature and humidity sensor Power supply: 3V button cell x 1 Battery model: CR2450 Temperature tolerance: ±0.2℃/±0.4℉ Humidity tolerance: ±2%RH LCD dimension: 2.8 (TN reflective segment code screen) Wireless connection: Zigbee 3.0(IEEE802.15.4) Applicable place: Indoor Working temperature: -5℃~40℃/14℉~140℉ Working humidity: 5%-95% RH, non-condensing APP Control: Compatible With eWeLink APP Voice Control 1: For Amazon Alexa Echo Smart Speaker Accessories Voice Control 2: For Google Home Assistant Smart Speaker Accessories Service: Retail, Wholesale, Dropshipping, Fast shipping, Free shipping Type 1: Smart Home Automation DIY Module Type 2: Smart Home Gadgets Type 3: Smart House Kit Type 4: Automation Residential Type 5: Smart Home Security Protection Alarm System Choice: yes semi_Choice: yes   SONOFF SNZB-02/02D/02P Temperature Humidity Sensor Zigbee Monitor Smart Home Automation Kits Support eWeLink Alexa Google IFTTT Description: 【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.   Working temperature:-10°C~60°C Wireless connection:zigbee 3.0 Product dimension:45x45x17.7mm Battery model:CR2477 Casing material:PC 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.