The widget can be used with both Elementor and WP Bakery plugins.
How to use the widget with the Elementor plugin
You will find the widget in the Elementor editor sidebar under WP Rentals Widgets
The widget can be added to the page with drag and drop, once added you will need to add the listing ID.
How to use the widget with the WP Bakery plugin
You can find the shortcode in the list of Bakery shortcodes
Once added to the page, the listing Id will need to be added to finish the setup
The design of the element will be the same on the front end, regardless if it was added with Bakery or Elemenetor.