A solid green light indicates that the Sync Module is connected and fully operational. A solid blue light means that the Sync Module is currently in pairing mode. A fast-flashing blue light indicates that the Sync Module is attempting to connect to Wi-Fi. A slow-flashing blue light indicates that the Sync Module is downloading a firmware update. A solid red light means that there is an issue with the Sync Module, such as a power loss or a problem with the internet connection.