1 Voltage profiles of countries around the world
At present, there are two types of voltages used in indoor electricity use in various countries, ranging from 100V to 130V and 220 to 240V. 100V, 110 ~ 130V are classified as low voltage, such as the United States, Japan and other voltages on board, pay attention to safety; 220 ~ 240V is called high voltage, including 220 volts in China and 230 volts in the United Kingdom and many European countries, The focus is on efficiency. In countries with 220-230V voltage, there are also cases where 110-130V voltage is used, such as Sweden and Russia.
100V: Japan, South Korea 2 countries
110～130V: China, Taiwan, the United States, Canada, Mexico, Panama, Cuba, Lebanon and other 30 countries
220～230V: China, Hong Kong (200V), Britain, Germany, France, Italy, Australia, India, Singapore, Thailand, Netherlands, Spain, Greece, Austria, Philippines, Norway, about 120 countries

2 travel abroad conversion plug
The national standard plug is used in China, Australia, New Zealand and Argentina and is characterized by three flat heads.
American standard plugs are used in the United States, Canada, Japan, Brazil, the Philippines, Thailand and other countries and Taiwan, characterized by a round and two flat.
British standard plugs are used in Hong Kong and the United Kingdom, India, Pakistan, Singapore, Malaysia, Vietnam, Indonesia, Maldives, Qatar and other countries and regions, characterized by three square heads.
European standard (German standard) plugs are used in Germany, France, the Netherlands, Denmark, Finland, Norway, Poland, Portugal, Austria, Belgium, Hungary, Spain, Sweden and other EU countries and South Korea, Russia and other countries. .
South African standard plugs are mainly used in South Africa, India, and Russia, and are characterized by three round heads. There are also Italian standard (Italian standard) plugs, Swiss standard (Swiss standard) plugs and so on.

There are also cases where multiple standards are used in the same country or region.