Swing Plug / plug

The ‘Swing Plug’ is designed for people using both of 110 and 220 volt-outlets. When we get to use electric devices, should always use a plug connecting to an outlet in order to consume power. Since it has not been united the level of voltage throughout the world, those plugs have different looks. Therefore, we should check what voltage the countries use and prepare multi-plug in advance when we go on a business trip or traveling abroad.