A wireless device can refer to any kind of communications equipment that does not require a physical wire for relaying information to another device. In most cases, however, when someone refers to a wireless device, they are speaking of a networking device that can pass data to other wireless network gear without being physically connected.In the home and office, wireless routers with built-in modems, hubs and switches broadcast a local area network (LAN) for computers in the area to join. Broadcasting distance varies widely depending on many factors. Any computer on the network can share resources that are connected to the network, including a high-speed Internet connection, printer or other office equipment.