Service Support: If there are any issues with our outdoor Fiber Optic HDMI 2.1 Cable, we will provide after-sales service support. ^^Reliable Armoured DesignOur HDMI 2.1 fiber optic cables adopt a triple-layer shielded (aramid yarn+aluminum foil+armored alloy conduit) design. Slim and Flexible. There is no need to worry about cable damage when used outdoors. The bending radius is greater than 20mm, making it easy to install in narrow areas. 10X more pressure resistant / tensile strength than regular PVC. ^^One-way TransmissionArmored optical HDMI 2.1 cable is one-way transmission "SOURCE" plug for connecting HDMI source(Blu-ray, STBox etc. ) DISPLAY plug for connecting your HDMI display device(TV, cinema projector, etc. )