Atlona Dual HDMI & VGA/Audio to HDBaseT The Atlona AT-HDVS-150-TX is a 3×1 switcher with display control for HDMI and VGA transmission over HDBaseT™. It features two HDMI inputs plus a VGA input with 3.5mm audio connector. Designed as a remote input device for the AT-UHD-CLSO-824 matrix switche.