Earlier this year I bought an EMF meter to identify the higher levels of radiation in my house. WiFi is a significant contributer to these levels. So I decided to move from WiFi to Ethernet using TP-Link plug-ins to the house power supply. And they work incredibly well.
But I have some older items; internet radio and my tablet computer; in different rooms but without Ethernet connection. Hence my purchase of the TP-LINK WiFi routers, one for the tablet and one for my internet radio.
I switch on the TP-LINK routers, connected to my local network, supplied by my master router via ethernet, when I'm using my tablet and radio. But I can turn off the routers when I'm not using them and the radiation levels in my house are thus minimised.
These TP-Link routers are great and I'd most certainly recommend them to anyone for whatever purpose; interestingly, the effective range is more than enough of I want to move to another room with my tablet. For me, they were money well spent.