Insert the time from a DateTimePiker

I have a Datetimpiker but from this I only want to capture the time, in the format I put the time property and it stays like this

bd fields

That's how I needed it, those two fields are in the database as time type, but since the application keeps saving them as datetime, it's not enough just to change the format property to time?

How can I save the time from the application and when it is already in the database capture the time and show it to me as it is in the database

 private void BtnGuardar_Click(object sender, EventArgs e)
        {

            if (operacion == "Insertar")
            {

                objetask.FInicio1 = Convert.ToDateTime(dateHInicio.Value);
                objetask.HFin1 = Convert.ToDateTime(dateFin.Value);       
                objetask.Notas1 = txtNotas.Text;
                objetask.InsertarActividad();
                MessageBox.Show("Insertado correctamente");
                this.Close();
            }
            else if (operacion == "Editar")
            {

                objetask.HInicio1 = Convert.ToDateTime(dateHInicio.Value);
                objetask.HFin1 = Convert.ToDateTime(dateHFin.Value);
                objetask.Notas1 = txtNotas.Text;
                objetask.ActualizarActividad();
                MessageBox.Show("Se edito correctamente");
                this.Close();
            }
        }

exception

 public void InsertarActividad()
        {
            using (var connection = GetConnection())
            {
                connection.Open();
                using (var command = new SqlCommand())
                {
                    command.Connection = connection;
                    command.CommandText = "InsertarActividad";
                    command.CommandType = CommandType.StoredProcedure;
                    command.Parameters.AddWithValue("@DocRefe", DocRefe);
                    command.Parameters.AddWithValue("@NomActivi", NomActivi);
                    command.Parameters.AddWithValue("@CodTarea", CodTarea);
                    command.Parameters.AddWithValue("@codtipo", CodTipo);
                    command.Parameters.AddWithValue("@codprio", CodPrio);
                    command.Parameters.AddWithValue("@codresp", CodResp);
                    command.Parameters.AddWithValue("@codestad", CodEstad);
                    command.Parameters.AddWithValue("@fcreacion", FCreacion);
                    command.Parameters.AddWithValue("@finicio", FInicio);
                    command.Parameters.AddWithValue("@ffin", FFin);
                    command.Parameters.AddWithValue("@HInicio", HInicio);
                    command.Parameters.AddWithValue("@HFin", HFin);
                    command.Parameters.AddWithValue("@CodComplet", CodComplet);
                    command.Parameters.AddWithValue("@Notas", Notas);
                    command.ExecuteNonQuery();
                    command.Parameters.Clear();
                }
            }
        }

I don't know why it tells me that the error comes from bd