Lenovo 4X90J31021 USB graphics adapter 3840 x 2160 pixels Black

The Lenovo USB 3 to DP Adapter delivers combined video and audio over a single USB port to a DP display. This adapter is unique in that it provides a spectrum of resolutions at high speeds all the way to 4K*. Connect up to 6 monitors (one adapter per monitor) at high resolutions.
Ideal for end customers wanting a 4K* solution for conference room displays, digital signage, or to enable an existing PC to support DP displays up to the latest 4K* monitors.Benefits:
High quality with low latency
Can enable up to 6 USB displays (one adapter per monitor)
USB bus power (no external power supply)
Features:
Max 3840x2160@30Hz 4K*output
Backward compatible with QHD and HD monitors
DP 1.1 interface (DisplayPort)
Integrated DisplayPort Audio
Note: Adapter is backwards compatible with USB 2.0, but in most cases performance above 1080P over USB 2.0 will likely be unsatisfactory.