Travel adapters are devices that allow travelers to use their electronic devices in different countries, which may have different electrical standards and socket types. Here are some of the features of travel adapters:

Plug type compatibility: Travel adapters come in different plug types to match the electrical standards of different countries. The most common types are Type A, Type B, Type C, Type D, Type E, Type F, Type G, Type H, Type I, Type J, Type K, and Type L.

Socket compatibility: Travel adapters also come in different socket types to match the sockets found in different countries. The most common types are Type A, Type B, Type C, Type D, Type E, Type F, Type G, Type H, Type I, Type J, Type K, and Type L.

Voltage compatibility: Travel adapters can be designed to handle different voltage levels, which may vary from country to country. Some adapters are designed for 110-120V systems, while others are designed for 220-240V systems.

Compact design: Travel adapters are designed to be compact and portable, making them easy to carry in a backpack, purse, or luggage.

Built-in USB ports: Many travel adapters have built-in USB ports, allowing travelers to charge their electronic devices directly from the adapter.

Surge protection: Some travel adapters are designed with surge protection to protect electronic devices from power surges and voltage spikes.

Grounding: Some travel adapters provide grounding for electronic devices, which can improve safety and protect against electrical shock.

Overall, the features of travel adapters will vary depending on the specific product and the needs of the traveler. It's important to choose a travel adapter that is compatible with the electrical standards and sockets in the countries you will be visiting.