SONOFF SNZB-02B AirGuard TH Lite Zigbee Temperature Humidity Sensor, Thermometer Hygrometer with App Alert, Remote Monitoring for Greenhouse Cigar Humidor, Works Alexa & Google Home, 4-Pack

[High Precision & Fast Refresh] Built-in Swiss professional-grade sensor, delivering temperature accuracy of ±0.2°C and humidity accuracy of ±2% RH. Updates every 5 seconds for real-time. [Environmental Monitoring] Monitor temperature, humidity, dew point, and VPD remotely via the app. Its compact, ultra-slim design fits easily into tight spaces such as guitar cases, reptile terrariums, and other confined areas. [Long Battery Life] Powered by standard AAA batteries for easy replacement, offering up to 2 years of battery life. Ideal for hard-to-reach installations like attics or storage cabinets, eliminating the hassle of frequent recharging. [Comfort Alerts] Customize temperature and humidity thresholds and receive instant app alerts when values exceed your settings. Supports smart scene automation with smart plugs to control fans, humidifiers, and other devices automatically. [Zigbee 3.0 Compatible] Based on the Zigbee 3.0 protocol, compatible with iHost, NSPanel Pro, ZB Bridge Pro, and other Zigbee gateways. Also supports Echo (4th Gen), SmartThings Hub V3, and selected third-party Zigbee hubs.