4K 70M HDMI Extender with RS232 Extension, HDBaseT PoC, EVBMS-M107
USB Type C to RS232 DB9 Serial(9-Pin) Converter – ELECABLE
HDMI Switch 16 Port 4K 60Hz Auto Switch With RS232/LAN-TESmart
RB-4KHDMI-T 4K HDMI over fiber transmitter single strand with RS232 ch – Fosco Connect
4K RS232 hdmi to fiber optic extender video audio hdmi kvm transmitter and receiver 10km - AliExpress
Amazon.com: TESmart 4x4 Multi-viewer HDMI Matrix 4K Video Switcher 4K@30hz, HDCP, EDID, 4 in 4 Out Updated 4x4 HDMI Matrix Switcher Control by IR Remote, RS232 : Electronics
Mini Type HDMI Extender Over Fiber Optic Transmitter&Receiver+1Ch RS232 Data,1080P,Euro Charger with 3G,SM,SX,10KM,LC SFP - AliExpress
4x1 HDMI Switch with IR & RS-232 Control
IP FHD Digital KVM Extender over Fiber/Cat5--Dual HDMI / USB2.0 / Audi
4K HDMI with RS 232 data over Optic Fiber Extender – Transwan
MuxLab HDMI/RS232 Extender Kit 500454 B&H Photo Video
Pro AV/IT HDBaseT™ 4K60 18G HDMI Extender Kit with Audio, RS232, IR, PoC up to 492ft
HDMI extender over dual cat.X with bi-directional IR, RS-232, Auto EDID Learning, ARC and CEC
OMX-01HMHM0002 HDMI Extender - HDBaseT standards for 4K
HDMI HDBaseT Extender with IR/RS-232 Control and PoC - 100m, 3D, Power over Cable, 4Kx2K