Body worn video (police equipment) prepared for the United States Department of Justice in 2016 is that body worn cameras "are cameras with at least one microphone and internal data storage, and allow audio/video footage to be stored and analyzed with compatible software. The cameras are typically located on the police officer's chest or head". Wearable cameras are often utilized by law enforcement to record their interactions with the public or gather video evidence at crime scenes. Current body cameras are much lighter and smaller than the first experiments with wearable cameras as early as 1998. There are several types of body cameras made by
Body worn video over device functionality, optics, audio, GPS, and several more categories. Some of the leading companies in the police body camera industry are Wolfcom, Axon, Vievu, and Vidcie. Each has different camera designs, but all cameras tend to be about 3 inches. Axon's model includes two components: a button which the officer has to double click to start filming and a penny sized camera, which attaches to any type of gear such as safety glasses or an officer's collar. The double-clicking mechanism makes sure officers don't accidentally turn it on. Vievu and Vidcie's camera have sliders to turn the camera on,