Question about Primewire HDMI Cable 2.1, 8K @ 120Hz / 4K @ 240Hz DSC, Ultra High Speed, Nylon Jacket, HDR, ARC

Hello, Primewire eARC, 8K @ 120Hz / 4K @ 240Hz DSC, ultra high speed, nylon jacket, HDR, ARC -This HDMI 2.1 ARC cable and why not eARC for an HDMI 2.1 cable? Strange? -There's a big difference between arc and earc example -The bandwidth restrictions of ARC mean that you won't be able to take advantage of the high audio throughput that eARC can provide. -If it's ARC only, this cable is worthless! -Example -eARC & ARC audio format -Audio format: ARC Dolby TrueHD: No -DTS, DTS Master, DTS-X: No ouch, ouch, ouch -" " : PCM (LPCM) multichannel * ARC No, eARC Yes etc...