This product is either discontinued or we cannot get that from suppliers.
Kensington 33985, HDMI, Mini-DisplayPort, Resolution 4K 30Hz, Connections HDMI Out, Host Interface: Mini DisplayPort 1.2, Wired, Video Adapter Mini DisplayPort 1.2 > HDMI, Output 1 x HDMI Female (19-pin), Single Display – 4K (4k UHD)
Quickly and easily project in Ultra HD (3840x2160 at 30Hz) from your computer to a 4K monitor, TV, or projector without the need for a 4K graphics card.