I use Plusnet fibre optic and the speed is 300mb. I just bought the wifi extender RE705X .

I need to give internet to my studio space in the garden, which is around 16 meter far from the access point (plusnet) if i plug the extender inside the studio it says that it's too far, if i plug the extender near the kitchen door (the door that get access to the garden) it's too close and in the studio the extender signal is not powerful.

Could you please help me to choose the right extender or anything else that help me to get internet working in the studio? I have tried also the Extender with AC Passthrough but because the studio cable has been added later this is not working properly.

Best,
Fabio