How to pass multiple selected checkbox I have checked to another page

Currently, I have no idea how to pass multiple selected checkbox to the CompareProduct.aspx. I only can pass 1 selected checkbox to next page at a time .
This is Products.aspx :

<asp:DataList ID="DataList1" runat="server" RepeatColumns="3" RepeatDirection="Horizontal" BorderColor="Black" GridLines="Horizontal" BorderStyle="Solid">
<ItemTemplate>
<input runat="server" id="FavChkBox" type="checkbox" value='<%#Eval("Product_ID") %>' />
  COMPARE&nbsp;<a href='ProductItems.aspx?prodId=<%#Eval("Product_ID")%>'><img src="Images/<%#Eval("Product_Image") %>" height="330" width="300" /> </a>
  Name:
 <asp:Label ID="prodNameLabel" runat="server" Text='<%# Eval("Product_Name") %>' />
  <br />

 Price:
  <asp:Label ID="prodPriceLabel" runat="server" Text='<%# Eval("Unit_Price") %>' />
   <br />

 </td>

I am using datalist to display the selected items i have select from Products.cs
Below are CompareProducts.aspx.cs codes:

  protected void Page_Load(object sender, EventArgs e)
{

        if (!IsPostBack)
        {

            Product aProd = new Product();


            SqlConnection con = new SqlConnection(strcon);
            SqlCommand cmd = new SqlCommand("SELECT * FROM Products WHERE Product_ID = @ProdID", con);
            SqlDataAdapter adp = new SqlDataAdapter(cmd);
            DataSet ds = new DataSet();
            cmd.Parameters.AddWithValue("@ProdID", Page.Request.QueryString["ProdID"].ToString());
            con.Open();
            adp.Fill(ds, "Products");
            cmd.ExecuteNonQuery();
            con.Close();
           DataList1.DataSource = ds;
          DataList1.DataBind();

        }

Any help will be greatly appreciated! :)