Home wireless networks that connect your tablet,PC and smart phone to your home network and the Internet use Wi-Fi..
Wi-Fi is a wireless standard used on both home and public wireless networks worldwide. (WLAN)
Wi-Fi Range Extender/Repeater

Place in range of the existing Wireless network, and it will take the signal from the network and rebroadcast it, thus increasing the range of the network.
Modern ones plug directly into a mains socket and require no other connections
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Sonos speakers set-up
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Troubleshooting other problems
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New tablet/Smartphone /PC/IMAC setup & training