TESmart Video Switcher 16 In 1 Out 16 Ports Ways Auto Scan 16x1 Splitter Rs232 DVI-D IP EDID 4k30hz Hdmi Switch with Lan Port - AliExpress
4x1 Switcher for HDMI with RS232 | Gefen
Amazon.com: KVM Switch with Serial Port Control, 4K@60Hz 4 in 1 Out HDMI KVM Switcher Box for Share Mouse Keyboard and Monitor, Can Work with Pi-kvm, Compatible with Windows/Linux/Mac System : Electronics
8 Port HDMI Switch 4K 60Hz Auto Switch With RS232/LAN-TESmart
Amazon.com: TESmart 8x8 HDMI Matrix 4K Matrix Switcher Support EDID, 4K@30HZ, 1080P 3D, HDCP, 8 in 8 Out HDMI Switch with IR Remote Control, RS232, TCP/IP Control, Rack-Mount HDMI Matrix : Electronics