How to get all products from woo-commerce?

I have setup Woo-Commerce which have more than 1000 products. Using Woocommerce rest api php library I am trying to get all products.

But it gives me 10 products. If I use filter[limit] it gives me around 400 products not more than this.

$res = $wc_api->get_products(array( 'filter[limit]' => 400 ) );

Can anyone say me how can I get all products from woocommerce?