Octava 4 x 1 HDMI Audio switch with ARC and Optical Audio output Switch 4 HDMI sources to 1 output. 4k UHD 3840x2160 4k (3840x2160), HDR, HDCP 2.2 support, Convert HDMI Input Audio source to Optical Audio Format Switch directly from 4 Optical inputs to the Optical Output Remote controlled, RS-232 controlled, manually controlled