I have a laptop and want to go and two screens without duplicating which device do I need for it (adapter)
Does your laptop really only have one exit? Also no mini HDMI or display port?
If you only use the HDMI output from the laptop and want to connect two monitors to it, then you could work with a splitter. However, the laptop would still only recognize this as 1 monitor and therefore output the same image to both monitors. Similar to the test images in Saturn on the televisions.
Can you still add a USB hdmi sickt, or use a Google cromecarst.