1-Year Guarantee: With years of USB production experience, we have complete production and quality control flow. 100% quality check have been carried out. We provide 1 year quality guarantee. If any query in using, feel free to contact us by email on manual. We'll handle for you as soon as possible within 24 hours. Reliable Quality: Both the USB hub with extension cable are true USB 3.0. The hub is with over-current, over-charging and short-circuit protection. The extension cable measures 6mm in the cable thickness with tinned copper core, alluminium foil, and shielded woven mesh around it with longer, stabler transfer distance and less signal loss. Triple-Use-In-One: This 4-port USB hub and the extension cable reach 80cm distance and extend the USB port back of PC or Tv to the desk easily. It also can be detached for triple use in work, travel or at home: The USB hub cable measures 30cm which is short and neat, the extension cable is 50cm, the total length is 80cm. It's much more portable and practical than mon-removable cable. Wide Compatibility: YaimhSound 4-port USB splitter applies to various devices- laptop, pc tower, tv, printer, projector, car, keyboard, mouse, gaming machine, flash drive, card reader, SSD, phone, camera, USB fan and USB light. It’s plug and play and compatible with Windows, Mac, Linux system. SuperSpeed: With 4 efficient USB 3.0 ports, this USB extender supports up to 5 Gbps fast data transfer and is able to transfer an HD movie in seconds or works with SSD stably. All 4 ports and the extension cable are true USB 3.0 and meet the USB-IF standard of USB protocols on data transfer and charging.