Capos are amazing inventions which allow you to change keys without learning new chords. They all consist of a bar that presses down across all the strings, or a subset of the strings.
What sets different capos apart is how they accomplish that task, and how fast they are to change from one setting to another.
Some capos are spring loaded, allowing you to change settings relatively easily, while others are a bit more complicated. Some allow you to control the tension across the strings.
Click on the links below for information on different capos, to help you choose the one that is right for you.
-> How to choose a capo <-
More on the way, please check back often.
Remember, music makes the world a better place, so keep playing!