Universal Travel Power Adaptor Plug- 2 Usb Ports

This adapter is not suitable high power electrical appliances
Retractable plug, convenient to carry.  
Multifunction plug contains a variety of pins
The pin can be retracted to meet different charging demands.

Reference lists for various conversion plugs:
National standard: plugs can be used in China, Australia, New Zealand and Argentina, featuring with three flat pin heads.
American Standard: plug used in the United States, Canada, Japan, Brazil, Philippines, Thailand and other countries and Taiwan, featuring with two flat pin heads.
British Standard: plug used in Hongkong and England, India, Pakistan, Singapore, Malaysia, Vietnam, Indonesia, Maldives, Qatar and other countries and regions, featuring with three square pin heads.
The European standard (Germany standard): plug used in Germany, France, Holland, Denmark, Finland, Norway, Poland, Portugal, Austria, Belgium, Hungary, Spain, Sweden and other European countries and South Korea, Russia and other countries, featuring with two round pin heads.
Australian Standard: used in Australia and New Zealand, featuring with splay pin heads.
South African standard: plug is mainly used in South Africa, India, Russia, featuring with three round pin head. There are also Italy standard (Italy) plugs, Swiss standards (Swiss standard) plugs, etc.