I now have 2 of these extenders but the review section only allows me to review one even though I have 2 different model numbers.So - how did I come to need an extender?After changing from a broadband router to a SIM card router due to poor broadband connections (the to distance from the exchange to our house is far so service is poor and speeds were terrible) we found improved speeds to the majority of our house - However - the items in certain areas seemed to be experiencing issues such as steaming quality & constant disconnects as what the new router made up for in speed it seems to be lack in signal range/strength. Fine if your items are sitting on top of it, not so good if there are walls involved.Our CCTV requires an Ethernet connection to be viewable on our phones, so now I was in a dilemma as the new router was set up in a different location to the old one so I couldn’t view the CCTV remotely without running 100 foot of Ethernet cable around the house - not happening.TP-Link TL-WA850RE N300 Universal Range ExtenderI purchased the N300 WiFi extender mainly to sort the CCTV issue (being as it has an Ethernet port on it) but also noticed it’s helped improve the TV in the same room which started experiencing streaming quality issues and dropping out constantly when trying to watch Netflix or Amazon since the change in the router. There’s been a noticeable improvement in our viewing experience which is now playing 4K without issue, buffering, lag or quality deterioration.It is simple to set up - plug it in and the light displays red, press the WPS button on the router and then also on the booster and it connects.My partner did this himself and he is a self-proclaimed technophobe. He was proud he didn’t need me to sort it for him & he set it up whilst I was away. Using an extension lead he set it up in the room where the router is and then once connected he moved it to the neighbouring room where the CCTV & other TV live.When plugged in he said the lights show the signal strength so you can gauge if it’s going to work. He found it was a 3 in his chosen spot and it’s working perfectly.I'm under the impression that you can set it up without the WPS button but being as we have one then I didn’t have to worry about working that out. It was pretty much plug and play in setup respects.I have bought another one for down the garden to keep all our smart plugs in the workshops connected as the signal down there is intermittent (review below)The light on it is quite bright so depending on its location you might consider a bit of tape over the light but be careful not to press anything as the centre is a button.Very happy - would recommend to anyone needing to boost the signal around their router.Just FYI - in response to some of the questions I’ve seen asked about boosters and extenders - you need a router with a live connection/service/subscription. This in itself is not a router so without the main router, this will not work. Think of it as an extension lead.It’s signal based and doesn’t use the power lines so you don’t need to plug it into the same ring main as the router. As long as it’s paired correctly, then move it where you want it and plug it into any power socket or extension lead you want. Assuming the signal strength light on it shows it's getting a signal from your router then it’ll work.UPDATE - I have just found there is an app which I can use & this has the option to switch the super bright LED off during a set time. So now at 9 pm the lights go off & at 9 am they come back on. Great for bedtime as this extender is located in the bedroom. No more luminous blue walls keeping me awake at night.TP-LINK RE220 AC750 Universal Dual Band Range ExtenderThis was purchased to cover an additional wifi dead zone but since my laptop etc runs on the 5G channel (not 2.4) I went for the Dual Band version this time.Really simple to set up. I had the Tether App already installed from my router & other extender, so simply plugged the extender in near to the router (So it picked up a good signal), opened the app & followed the instructions to add a new one. It scanned, found it & added it.I moved it around until I found the prime spot I wanted to position it, so it had a strong signal from the router but also provided a good signal to the office. It has lights on it that are red for poor signal & green for good. The first place I positioned it gave a green for 5G but red for 2.4, so I moved it a bit closer to the router & now it's all green. Nice & easy.Once that was done, I set about adding all my extra devices to it, such. as my Echo Dot. I scanned for the extender and added it as if it was any other wifi device.It uses the exact same login info, so no need to try & remember additional codes etc.Now I can work from my office as easy as if I'm sitting in the living room where the router is located, as the signal is now boosted to the garden, office & workshops whereas before things used to keep dropping off due to poor wifi signal.The whole set up took less than 5 minutes - very simple & no need to be an IT expert.5 Stars - would recommend these extenders.