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Wireless routers are devices used to connect multiple electronic devices, such as computers and smartphones, to a network without the need for physical cables. They utilize radio frequency signals to transmit data between devices, allowing for greater mobility and flexibility in device placement within a space. Wireless routers often come equipped with various features such as built-in firewalls, parental controls, and guest networks, providing added security and customization options for users. These devices serve as the backbone of modern wireless networks, enabling seamless communication and information sharing between devices in both personal and professional settings.