WiFi Repeater, how to set up, When to use it 

I had to put my IP 192.168.10.1 but in your wifi repeater could be a different address. Always check the info label on your device. There's info about login, password and address what you have to put in your browser.
If you have any questions about how to set up repeaters just type in comments below :)
Best Repeaters to buy on market - amzn.to/2DjXsEF
WiFi Repeater 300Mbps - amzn.to/2IjGE4u
WiFi TP-link extender, booster - amzn.to/2IfUcxA
WiFi Dual band extender (2G,5G) TP-link - amzn.to/2Dku5C0
...you can use powerline adaptor which is more simple to use:
TP-Link 600Mbps - amzn.to/2p4DhFJ
BT 600Mbps - amzn.to/2DgOzvz

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