Custom woo badge

function king_woo_custom_badge($text, $post, $_product){

    global $product;

    if ( is_product() || is_shop() ){

        $r_price = $product->get_regular_price();

        if (int()$r_price > 399)
            return '<span class="onsale">_YOUR_CUSTOM_BADGE</span>';
        else
            return;

    }
}

add_filter('woocommerce_sale_flash', 'king_woo_custom_badge', 10, 3);