Model: H5044(gateway)&B5220(sensor) This 5-in-1 monitor features Bluetooth/Gateway connectivity, with up to 1640ft instant alerts. It has a 2-year battery life, and tracks temperature, humidity, and comfort levels. 5-in-1 Multi-Monitor Functionality: Integrates temperature, humidity, comfort level, and weather forecasts into one device. Stay ahead of environmental changes with precise, real-time insights into every subtle shift in your space. 2s Refresh ±0.54°F & ±3%RH Dual Accuracy: Featuring precision temperature accuracy of ±0.54°F and humidity accuracy of ±3%RH, this device delivers reliable data, making it ideal for sensitive spaces. Bluetooth & Gateway Dual-Mode for Ultra-Long Range Connectivity: In Bluetooth mode, enjoy reliable remote monitoring up to 196ft. With the Gateway, one unit covers an expansive 1640ft range, penetrates thick walls to eliminate dead spots, and supports managing up to 64 devices for whole-home monitoring. 4-Way Instant Alerts for Critical Environment Changes: Monitor real-time data and trend graphs anytime, anywhere via the app. Receive instant notifications when temperature or humidity deviates from your custom settings. Ultra-Long Battery Life & 2-Year Data Export: Enjoy up to 2 years of battery life in Bluetooth mode and 1 year with the Gateway. The device automatically stores 2 years of historical data, which can be exported with one click.