A dock for connecting a smartphone to a display and peripherals is disclosed. The dock transfers audio/video data to a display, establishes a wireless link with peripherals and possesses a KVM function. The dock has a controller with a switch, a wireless communication module, a USB hub, a relay, two USB connectors, a, USB switch, an AV converter, an AV switch, and two AV connectors. The relay normally connects AV data from the smartphone to the AV converter. The controller switches the relay while the switch is being operated, the wireless communication module establishes the wireless link with the smartphone. And the USB switch and AV switch can switch one of an external computer and a smartphone to be connected with the display and peripherals.