Combobox binding question

I'm racking my head with the following:

When I run the code and make selection: Item1
I get the result:  System.Windows.Controls.ComboBoxItem: Item1
Instead of just: Item1

What am I doind wrong?

The Equity.cs:

namespace ComboBoxText
{
    class Equity : INotifyPropertyChanged

    {
        private string country;
        public string Country
        {
             
            get { return country; }
            set
            {
                country = value;
                OnPropertyChanged("Country");
            }
        }
        public event PropertyChangedEventHandler PropertyChanged;
        private void OnPropertyChanged(string propertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
            Debug.Print($" changed: {Country}");

        }
    }
}

public partial class MainWindow : Window
    {
        Equity ET = new Equity();
        public MainWindow()
        {
            InitializeComponent();
            this.DataContext = ET;

        }
    }

The xaml code:

<Grid><StackPanel><ComboBox x:Name="Country4" Height="35" Width="200" 
                  Margin="20,20,20,20"
                  SelectedItem ="{Binding Country, Mode=TwoWay}"><ComboBoxItem>Item1</ComboBoxItem><ComboBoxItem>Item2</ComboBoxItem></ComboBox><TextBox x:Name="Txtbx1" Width="500" Height="30"
                 Text="{Binding Path = Country}"></TextBox></StackPanel></Grid>