Part Number Replacement: This thermostat panel is a direct replacement for part number HZ311. It is designed to meet performance and reliability specifications. Enhanced Compatibility: This panel is designed to work seamlessly with for systems and may be compatible with other HVAC systems, providing a wide range of usability and a versatile choice for your heating and cooling needs. Premium Construction: This HZ311 panel is built to last with top-quality materials. It provides a reliable solution for your home climate management, ensuring long-term performance and durability. Easy Integration: This panel integrates smoothly with your existing HVAC system without the need for extensive modifications. It is designed to increase efficiency and control, thereby enhancing the overall performance of your heating and cooling system. Professional Grade Product: Perfect for professional installers and DIY enthusiasts, this panel provides a direct upgrade path to enhance system functionality and user experience, and comes with Part Number quality assurance. Color: Silver Grey Material: plastic Package Contents: 1 x Thermostat Panel Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.