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.