Oculus is also releasing a pair of controllers to be used with the Rift, called Oculus Touch. The controllers are sold as a pair, and are mirrors of each other- one for each hand. They are lightweight, wireless, handheld motion controllers featuring a joystick, buttons, and two triggers- one for grabbing and one for shooting or firing. The controllers are fully tracked in 3D space by the Constellation system, so that the user sees them in virtual reality responding to their real world counterpart, giving the user the sensation of their hands being present in the virtual space.
Source: Wikipedia, "Oculus Rift", available under the CC-BY-SA License.