The Atlona JunoX 451 (AT-JUNO-451) is a four-input, one-output HDMI switcher built for 4K and HDR sources. It is HDCP 2.2 compliant and passes 4K/UHD video at 60 Hz with 4:4:4 chroma sampling and HDMI data rates up to 18 Gbps, including HDR metadata, so Ultra HD Blu-ray players, media players, set-top boxes and laptops can share a single TV, projector or display. Automatic input switching looks for both the 5 V hot plug detect signal and active video, which keeps switching reliable with sources such as DisplayPort adapters that hold HPD high without sending video. The unit supports HDMI Audio Return Channel and has a TOSLINK optical output for sending ARC or de-embedded HDMI audio to an AV receiver or soundbar. It can be controlled over Ethernet (web GUI and TCP/IP), RS-232 and IR, and a handheld IR remote is included, making it suitable for boardrooms, TV showrooms, classrooms and home cinemas. Atlona backs it with a 10-year limited warranty.