I spoke with Lenovo, the serial number and model do not exist as Lenovo products.
Two different Lenovo branded hubs, both purchased from Amazon. The latest one has been refunded by Amazon. They are not even USB3 (5Gb/s)as advertised, they are both USB2 (480 Mb/s) and both cause weird behaviours with suddenly ejecting HD's and the HDMI port. The scary thing is I asked friends to check their hubs, and almost all (not only Lenovo) were fake (and flaky).