ISE 2020: ATEN Features VP1421 4K Presentation Matrix Switcher on the HDBaseT Alliance Stand February 15, 2020 | Home / February 15, 2020 rave-video / ISE 2020: ATEN Features VP1421 4K Presentation Matrix Switcher on the HDBaseT Alliance Stand Look in: ISE ISE 2020: ATEN Features VP1421 4K Presentation Matrix Switcher on the HDBaseT Alliance Stand