Is there a device that can output the same image to 3 monitors at 1080p?

I want to use a Mac Mini to drive 3 1080p monitors with exactly the same image. Three large monitors will be used to display the same image to the public and I need 1 display to manage the Mac. As the output on the three large monitors will be the same and the Mac Mini has only 1 HDMI out can I buy a repeater of some sort that will repeat the single to three HDMI outputs? I have seen splitters that allow you to switch between three monitors but not output the same signal to three monitors.

Thanks

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