1. USB4 Extension Cable:This USB-C extension cable fully complies with USB4 specifications. It is designed to extend and protect the USB Type C connector on all USB - C devices; aiming to solve the problem of insufficient cable length. If you frequently need to plug and unplug; using our Thunderbolt 3 & Thunderbolt 4 extension cable is a good choice to reduce the wear and tear on the device connector 2.NOTES:The maximum length of this USB4 extension cable is 2.15 meters (7 feet). If you purchase a 2-meter (6.6 feet) extension cable; at most 0.15 meters (0.49 feet) can be further connected. Beyond this length; it will not work 3.USB4.0 Max 40Gbps Data Transfer Rate:This USB4 Cable can Reach Data Transfer Rate up to 40Gbps;the transmissions speed is twice as fast as Thunderbolt 3.When you are transmitting data; your data transmission equipment needs to support 40Gbps; and your own data can reach 40Gbps; otherwise the data transmission rate will not be reached 4.8K@60Hz Video Transmission: Achieve longer video connection distances while maintaining high-definition image quality with video resolutions up to 8K@60Hz for a visual feast. It is backward compatible with 5K@60Hz; 4K@144Hz; 4K@120Hz; 4K@60Hz and more 5.PD3.1 240W Fast Charging:Via the USB PD 3.1 fast charging protocol; the output power can reach up to 240W (48V/5A); and it is compatible with 180W/140W/60W/45W/36W/27W/15W and more 6.Safety and Stability:The USB 4 extension cable is equipped with a E-Marker chip; which intelligently adjusts the parameters for charging; data transmission and video synchronization according to the device's power and provides overheating protection to ensure stability and 7.Robust and :The USB 4 extension cable is made of silver-plated copper core + gold-plated connector + aluminum alloy shell + braided nylon and other high-quality materials. It has strong transmission; anti-interference; corrosion resistance; heat dissipation and stability. With a sheath; it will not get tangled and has reliable quality