The Zero 2 is a keychain-sized controller that you can take anywhere. It has six main buttons, joystick, Bluetooth, rechargeable battery and micro-USB port. 8BitDo controllers are designed to be as versatile as possible with any modern device. So you can easily pair the controller as X-input or D-input device via Bluetooth. With the included cable you can even use it as a wired USB controller. 8BitDo also regularly updates the firmware for extended system compatibility such as Switch, Raspberry Pi, Retron5 and more.