But performance will vary depending on your mains electrical layout. If the main booster unit (near the hub) is on a circuit controlled by a different fuse or circuit breaker to the circuit you've plugged a secondary booster into, performance will often be poor, and in some cases it won't work at all.
My personal view is that plug in boosters are an unreliable solution to poor wifi coverage, and you'd be better off investing a few bob in a mesh wireless setup.
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I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router +2 Airport Express's. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.
yep i have the ASUS RT-AX88U and it's in an upstairs rooms and get whole house coverage. my nvidia shield pro downstairs in a cupboard connects to 5Ghz at between 400-500Mbps, and my laptop connects at 2.2Gbps (albeit it's usually in the same room and those speeds are mostly pointless when everything else on the LAN is gigabit at best).