Wireless transmission multimedia device

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A wireless transmission multimedia device includes a peripheral component unit, a processor, a controller, an ultra-wideband (UWB) controller and a decoder. The processor is electrically connected to the peripheral component unit for executing an instruction from the peripheral component unit. The controller is electrically connected to the processor, and issues a control signal according to execution of the instruction. The UWB controller is electrically connected to the controller, and wirelessly communicated with an external UWB interface. In response to the control signal, a data file is controlled to exchange between the UWB controller and the external UWB interface. The decoder is electrically connected to the controller for decoding the data file into a digital signal.