editable

Indicates whether the value of the NumericTextBox control will be editable by directly inputting numeric values from the keyboard, or only through the spinners and arrows.
Defaults to true.

<input id="numeric" />

<script type="text/javascript">
    $(function () {
        $("#numeric").shieldNumericTextBox({
            editable: false // disable editing from the input
       });
    });
</script>