Businesses in the audio visual equipment category supply products used to capture, process, display and reproduce sound and images. Their range may include televisions, projectors and screens, speakers, amplifiers, microphones, headphones, cameras, mixers, lighting equipment, cables and mounting accessories. Some specialise in equipment for homes, while others serve offices, schools, venues, places of worship, broadcasters or event organisers. Services can include equipment hire, delivery, setup and collection, as well as installation and configuration of systems such as meeting-room displays, public address systems, home cinema or digital signage. Staff may advise on compatibility and help customers choose equipment for a particular space or use. Businesses may also offer repairs, maintenance, testing, system upgrades and technical support, with the level of service varying according to the equipment and installation.