【2.2-inch LCD Display】A clear 2.2-inch LCD screen allows you to easily monitor temperature and humidity in real-time. 【High-Precision Measurement】With temperature accuracy up to ±0.2℃ and humidity accuracy up to ±2% RH, it ensures stable and reliable monitoring. 【IP65 Waterproof Rating】Maintains stable performance even in damp or splash-prone environments. Note: The IP65 protection rating is suitable for standard splash-resistant scenarios. Do not immerse the device in water, expose it to high-pressure water jets, or place it outdoors where it may be exposed to rain. 【Zigbee 3.0 Compatible】Supports Zigbee 3.0 hubs including SONOFF iHost, NSPanel Pro, ZBBridge-P, ZBBridge-U, ZBDongle-E, and ZBDongle-P. 【Flexible Installation】Comes with a magnetic backplate and hanging rope for easy and versatile mounting options. 【Long Battery Life】Powered by a CR2477 battery, it can last up to 2 years under normal use. 【Extensive Data Storage】Capable of storing historical data for up to 180 days, allowing for long-term trend analysis. 【Smart Features】Supports temperature/humidity alerts, automation scenarios, and voice query (compatible with Alexa and other voice assistants). Specifications: Model: SNZB-02WD IP Rating: IP65 Battery Model: CR2477 Housing Material: PC+ABS Wireless Connection: Zigbee 3.0 Working Temperature: -20℃ ~ 60℃ Working Humidity: 0-100% RH Input: 3V? Dimensions: 58.5mm x 62.8mm x 21.8mm Measurement Accuracy: ±0.2℃ / ±2%RH Refresh Rate: 5 seconds Display Units: Supports switching between Celsius (℃) and Fahrenheit (℉)