WooCommerce - Text before price, selected products

<?php
  // WooCommerce - add some text before the price for selected products
  // snippet goes in functions.php for your child theme
  // you can one or many "case" lines. Use your own product ids.
  // Intended for simple products only
  add_filter( 'woocommerce_price_html', 'add_from', 10, 2 );
  function add_from( $price, $product ) {
    $product_id = $product->get_id();
    switch ($product_id) {
      // list of product ids where this applies
      case 1801:
      case 2479:
        return 'From: '.$price;
        break;
       default:
         // any other products
         return $price;
     }
  }