Review on Belkin F4U110Bt Thunderbolt Upstream Transfer and Charging for 3840X2160 by Jason Herron

Despite what others have reported, I bought it to run 2 2K monitors. I just thought since 2 4k monitors were announced others must have been doing something wrong. I was wrong. If you connect both monitors through this device and the laptop's Thunderbolt port, you will not get any images. Unplug one of the HDMI video cables and voila - the other monitor (dlink) comes to life! Unplug the video cable and plug in the HDMI cable - the other monitor works. Tech support was surprised and didn't respond. I returned it.