【Lifetime Guarantee】You will get JASXUS 1-Pack (6.6 feet Black) Thunderbolt 3 Cable Cable and enjoy no-questions-ask free return and exchange for 12-month and lifetime warranty. We promise to issue full refund if you have any dissatisfaction. Any questions, 【Thunderbolt Cable JASXUS techonlogy 】 Thunderbolt cable E-MARK has acquired the certification. It passed quality inspect and Repeatedly test, meet both the Thunderbolt specifications and industry safety standards. Very soft to use Upgraded 3D aluminum connector and exclusive laser welding technology, which to ensure the metal part won't break Thunderbolt Speed: Thunderbolt cable data transfer speed is up to 20Gbps.Please NOTE that the data transfer speed will still depend on what port you are using with.The data transmission device needs to support Thunderbolt , the data can reach 20G, otherwise only the USB 3.2 transmission speed 2. If used in audio and video transmission, both devices must support audio and video function