Which laptop do you have?
What is the difference between the Flex and Flex Pro?
Flex Pro
Connects via a Silicon Motion driver — works with virtually any USB-C or USB-A port. No special video output port required.
Flex
Connects without a driver — requires either 2x USB-C ports or 1x USB-C + 1x HDMI. Both ports must support video output (Thunderbolt ⚡ or DisplayPort). Direct connection to your laptop, no software needed.