A wireless light switch is a light switch that commands a light or home appliance to turn itself off or on, instead of interrupting the power line going to the light fixture. Wireless light switches eliminate the wire from the light to the switch location. Wireless light is useful in remodeling situations where new wiring can be a hassle. Rather than tearing down a wall to gain access to the wires a wireless switch can be used. Wireless light avoids any need to access wires and makes remodeling fast and simple.

Wireless is a term used to describe telecommunications in which electromagnetic waves (rather than some form of wire) carrythe signal over part or all of the communication path. Wireless Capsule Endoscopy is a term used to describe a miniature capsule used to record images through the digestive tract for use in medicine. The capsule is a camera with the size and shape of a pill used to visualize the gastrointestinal tract. The procedure was approved by the U.S. Food and Drug Administration in 2001. It is an imaging device for the detection of gastrointestinal diseases.