Woocommerce Output current product's category

<?php
function pn_wc_single_product(){

    $product_cats = wp_get_post_terms( get_the_ID(), 'product_cat' );

    if ( $product_cats && ! is_wp_error ( $product_cats ) ){

        $single_cat = array_shift( $product_cats ); ?>

  <h2 itemprop="name" class="product_category_title"><span><?php echo $single_cat->name; ?></span></h2>
<?php
 }
add_action( 'woocommerce_single_product_summary', 'pn_wc_single_product', 2 );
?>