Show meta box data on theme

I a not so good at php. I've purchased conditional mea box. But I am unable to show the meta box data on my theme.
Here is my function.php code:

add_filter( 'rwmb_meta_boxes', 'Brands_and_Products' );
function Brands_and_Products( $meta_boxes )
{
	$meta_boxes[] = array(
		'id' => 'brand_product',
		'title' => 'Brands and Products',
		'post_types' => array( 'post', 'page' ),
		'context'	=> 'normal',
		'priority'	=> 'high',
		// Conditional Logic can be applied to Meta Box
		// In this example: Show this Meta Box by default. Hide it when post format is aside
		'hidden' => array( 'post_format', 'aside' ),
		'fields' => array(
			array(
				'id'	=> 'brand',
				'name'	=> 'Brand',
				'desc'	=> 'Pick Your Favourite Brand',
				'type'	=> 'select',
				'options' => array(
					'Samsung' 		=> 'Samsung',
					'Nokia' 		=> 'Nokia',
					'Symphone' 	=> 'Symphone',
					'Microsoft' 	=> 'Microsoft',
					'HTC' 		=> 'HTC',
					'Sony' 		=> 'Sony',
					'Huawei' 	=> 'Huawei'
				)
			),
			array(
				'id' 	=> 'Samsung_products',
				'name'	=> 'Which Apple product that you love?',
				'type'	=> 'radio',
				'options' => array(
					'Samsung galaxy S' 	=> 'Samsung galaxy S',
					'Samsung pop'		=> 'Samsung pop',
				),
				'hidden' => array( 'brand', '!=', 'Samsung' )
			),
      array(
				'id' 	=> 'Nokia_products',
				'name'	=> 'Which Apple product that you love?',
				'type'	=> 'radio',
				'options' => array(
					'Lumia' 	=> 'Lumia',
					'N Series'	=> 'N Series'
				),
				'hidden' => array( 'brand', '!=', 'Nokia' )
			),
		)
	);
	return $meta_boxes;
  }

And here is the echo data on my theme :
<?php echo get_post_meta($post->ID, 'Brands_and_Products', true);?>

Can you help me out ?

Thanks in advance.