Upgrade your home heating with this Zigbee Thermostatic Radiator Valve. It features a programmable TRV, app remote control, and a digital display for easy temperature management. Key Features: - Open Window Detection: Automatically detects rapid temperature drops when a window is opened and suspends heating for 30 minutes to save energy. - Visual Display: Adjustable brightness with real-time temperature display synced to the app for a clear view. - Flexible Screen Rotation: Rotate the screen display direction via the app to suit any installation angle. - Temperature Calibration: Adjust calibration values through the app to compensate for temperature differences between floor and air. - Child Lock: Prevents accidental operation by children. Technical Specifications: - Power Supply: 3 x 1.5V AA alkaline batteries (not included) - Standby Current: 6 μA minimum - Protection Degree: IP20 - Operation Temperature: 0~50°C - Max Temperature: 90°C (at radiator) - Material: Plastic - Specifications: Zigbee Compatibility: Works with Alexa and other smart home systems via Zigbee hub (sold separately). Package Includes: 1 x Smart Thermostatic Radiator Valve Note: Color may vary slightly due to lighting and display settings. Measurement tolerance: +/- 1-3 cm.