The meross c wire adapter provides a reliable solution for homes lacking a C-Wire, supplying continuous power to your smart thermostat by connecting directly to your heating and cooling system. This c-wire adapter is compatible with 95% of HVAC systems and works seamlessly with Meross and most other thermostat brands, offering broad versatility. Before purchase, ensure your system has 4 wires (W/W1, Y/Y1, G, R/Rc) or 3 wires (Y/Y1, G, R/Rc) by scanning the QR code for compatibility. This c-wire adapter for smart thermostat makes installation quick and easy, ensuring your thermostat stays powered at all times.