Service Support: If there are any issues with FURUI Fiber Optic HDMI 2.1 Cable, we will provide after-sales service support. hdmi cable 50ft, hdmi cable 50 ft, 50ft hdmi cable, 50 ft hdmi cable, 4k 120hz hdmi cable, 8k hdmi cable 50ft, hdmi 2.1 cable 50ft, eARC hdmi cable 8K@60Hz & 4K@120HzThe FURUI 8K fiber optic HDMI cable 50 ft support long distance at 8K@60Hz, 4K@60Hz/120Hz & up to 10K resolution. No signal loss. Compatible with Dolby Atmos, Dolby Vision, HDCP 2.2 & 2.3, DTS:X, Dynamic HDR, BT.2020, eARC, ALLM, QFT, QMS, VRR. Backward compatible with earlier versions of HDMI. If you need higher refresh rate (like,4K@120Hz) please make sure your device support it. please make sure your device (player, video ,tv,etc) support 8K. Hyper Speed 48GbpsThis HDMI 2.1 fiber optic cable support ultra high speed 48Gbps. Multi-transfer will result in HDMI signal loss. This type of fiber HDMI 2.1 cable is very thin and flexible, OD 0.189 inch (4.8mm). TPE Jacket. Plug and play, no exte