this cable made from crystal OM3 optical glass fibers, the TMDS signals were transmitted by light, the signals goes much faster in much longer distance with much much lower attenuation, meanwhile, optical transmission is free from any EMI (electro-magnetic interference), you can get the true signals by this cable in any complex electronic environment

HDMI 2.1 solution built in, this cable fully supports to the HDMI Version 2.1 features, refresh rates including 8K@60Hz (fps), 4K@120Hz(fps) and even up to 10K, Dynamic HDR 10, eARC (Enhanced Audio Return Channel), the bandwidth increased up to 48Gbps Ultra High Speed, Deep Color, 3D, CEC/EDID, HDCP 2.2, YUV 4:4:4, Dolby Vision, etc

Directional connection required, this active cable is required to be connected in direction, the plug with "DISPLAY" mark have to be connected to the display device, and the one with "SOURCE" mark have to be connected to the signal source device, the signal will get loss if the cable connected in an opposite direction, meanwhile, two pcs of such cables can not be connected by a HDMI female to female adapter directly to achieve a signal extension purpose.

this cable can be universally used between the devices which are HDMI 2.1 or backward versions featured, like the Blue-ray players, Apple TV, PS4/PS3, Xbox, Roku Ultra, 8K/4K UHD TV,8K/4K UHD projector, 8K/4K UHD Monitor, Laptop, etc.