Warning: Declaration of heavenly_bootstrap_walker_nav_menu::start_lvl(&$output, $depth, $args = NULL) should be compatible with Walker_Nav_Menu::start_lvl(&$output, $depth = 0, $args = NULL) in /home/mbthinki/www/project/arcadeon/wp-content/themes/heavenly/libs/nav-menu-walker.class.php on line 117
voltage - arcade-on.com

Power outlets standards over the world 

Power outlet and cord

There are more than 10 of different power outlet standards. Different shapes, pins configuration and voltage. How to manage it?