Hi, we just built a small garden office which is installed with electricity and an ethernet cable that runs from the router in the house to a socket in the office.

I currently have a netgear wifi range extender that I've connected to the ethernet socket, but the signal is still pretty patchy (and dropped out completely half way through a meeting today!).

I was looking at the 3 pack Deco X20 mesh kit to give me reliable internet out in the office as well as improve the signal upstairs in the house — I just wasn't sure if it would cover this distance (the office is about 120ft from the original router). 

Someone suggested a powerlink adapter (TL-WPA4220 KIT AV600) instead/as well? But do I need both if the office has a direct ethernet connection? 

Any advice would be much appreciated.

Thanks.