? : There is professional service team of Cykvis. If you have any problem, please contact us and we will reply within 24 hour. ? - : Can replace the microphone of your old computer, has a very good performance in personal family meetings, lets you have more fun at work and achieves free communication. ? : Instantly add 3 USB ports to use other compatible devices. The extended 5.9 ft cable allows for the perfect set up and easy access to out of the way ports. Use the included cable tie to adjust the length for maximum comfort and productivity. ? : The portable USB speaker has been professionally tuned by a tuner for mid and high frequency sound. The PC speaker is also equipped with a stereo unit. Provides a clear dialogue and music experience. ? : Combine speaker, microphone, usb hub, audio port, and control buttons in one. Our conference speaker hub do not need additional drivers, so you can plug and play in anytime.