Amazon.com: 4K Video Wall Controller, 1x2 TV Wall Processor Input Support 3840x2160@60HZ /30HZ DP1.2 Signal, Support Each Output 1920x1080/60HZ, Real 4K Resolution : Electronics
HDMI Splitter 4K@60Hz, HDMI Splitter 1 in 2 Out, HDMI Splitter for Dual Monitors Only Duplicate/Mirror Screens, Support HDMI2.0b, HDCP2.2, 18.5Gbps, Auto Scaling, Full HD 1080P 3D - Newegg.ca
Amazon.com: 3x3 Video Wall Controller 3840x2160/60HZ 4K with Media Player Splitter, Support HDMI 4K@30HZ Input, 1080/60HZ Each Output, IR Remote+Voice Control+RS232, Edge Masking, 3x2 2x2 3x1 2x3 4x2 2x4 Mode : Electronics