The ALF-B20K is an HDMI 2.0 booster designed to extend 4Kx2K@60Hz 4:4:4 signal up to 20m, and 4Kx2K@30Hz signal up to 35m over HDMI2.0 cables being powered by HDMI source, and the HDMI cables should support 18Gbps.
ALFATRON ALF-CV2.0 K 1.4
The ALF-CV2.0K 1.4 is an ultra-thin HDMI signal manager. It is designed to enhance the compatibility between HDMI sources and displays to match more display device.