KEY BOARD / MOUSE / SPEAKER / WEB CAM

Description

A computer keyboard is a typewriter-style device which uses an arrangement of buttons or keys to act as mechanical levers or electronic switches.
A computer mouse (plural mice or mouses) is a hand-held pointing device that detects two-dimensional motion relative to a surface.
The purpose of speakers is to produce audio output that can be heard by the listener. Speakers are transducers that convert electromagnetic waves into sound waves.
A webcam is a video camera that feeds or streams an image or video in real time to or through a computer to a computer network, such as the Internet. Webcams are typically small cameras that sit on a desk, attach to a user’s monitor, or are built into the hardware.