A/V switches and signal mixing switches can be complicated devices. Many are targeted for a specific purpose or have specific features. many type of Switchers:

Presentation Switchers & Matrices / Live Event Presentation Systems / All-in-One Presentation Systems / Auto Switchers / HDMI Switchers & Matrices / HD Base T Switchers & Matrices / Modular Matrices / Display Port & DVI Switchers & Matrices / SDI Switchers & Matrices / Analog Switchers  & Matrices / USB Switchers /  Office, Secure Switches / Accessories.