And I just got their reply, they replied promptly. So please check your device before you place an order.
“Hope that you are well and thank you for your enquiry into the SmoothLAN. Unfortunately, the cap is 100mbps so it would not be compatible with your 1GB/s network device. I have noticed that this information is not on the website so I will now add it in, thank you for reaching out and apologies that we could not provide the solution for your network.”