A WiFi extender is an easy way to add more Internet coverage to your home. The best will deliver fast internet speeds where you want them, without making you pay for expensive features you don’t need. We researched new technology advancements, like protocols and multi-band broadcasting, and combed through over 60,000 customer reviews to find two cutting-edge WiFi extenders that you can rely on to take your internet farther.
Best Overall– One of the most advanced extenders on the market, capable of handling WiFi speeds 1,000+ Mbps. Plus, with MU-MIMO and beamforming, it gets WiFi to more devices, faster.
Best Budget- The Essentials can handle up to 300 Mbps, more than enough speed for the average user. Its features are reliable but basic, meaning some significant savings.
This is just a part of The Best WiFi Extender guide from Reviews.com.Complete test you can read at their Picks for the Best WiFi Extender

How to set-up a wireless/wifi-network