Instead of putting on a helmet or looking into an eyepiece, you step into a small room. The CAVE also has other advantages. Because the viewer only needs to wear a special pair of glasses multiple people can enjoy the experience at the same time. Currently the CAVE is the only viewing device that allows for unrestricted movement. Among the more popular input devices are the data glove and the wand.
Data gloves offer a simple means of echoing hand gestures back to the computer.
Typically, you program the computer to change modes when certain gestures are made. For example, pointing up might zoom-in and pointing down might zoom out. The simulation could also replicate your hand movements. The wand, which comes in a variety of shapes and sizes, is the simplest and most popular input device. Some incorporate on-off buttons while others have dials or joysticks.