What is the difference between the 300 and 500.

The difference relates to the data transfer rate over the local link, the higher speeds would be useful if you were transferring a lot of data over your local network, such as transferring files between devices, notice I say local and not internet, if you're just using it to access the internet from a mobile then you don't need the 500.

How do you use this with Ethernet cable for one device and as a wifi extender as well in a wifi dead spot area?

I have the main unit cabled into the router in the lounge. The second unit is set up in the Loft/Office with the main PC and NAS box cabled into the ethernet ports, the works laptop use the wireless connection. I used to have a very weak signal in the bedrooms before, but now they have a very good signal. Once you have syncronised the second unit to the main unit everything is automatic. Hope that helps.

can additional extenders be added? So one base unit wired to the router, and have several extenders throughout the house?

Where do you purchase an additional homeplug? I need one more but don't really want the kit as I have the base unit already.

Can you connect other version's of a tp link powerline adapter to these?

You can, but with caveats. I had a pair of existing 2,000mbps 2 port plugs set up (TL-PA9020PKIT). One next to my router, the other in my office. They work great, and I had full 2,000mbps speeds. I bought this kit to extend wifi up to the loft and out to the garden, not really fully realising there was a non-wifi master, and a secondary wifi slave. So there is only one Wifi extender in this pack (TL-WPA7510KIT) It took me a few attempts, but I have now managed to get all 4 sharing my single network across 4 rooms. The trick seemed to be pairing them in a string sequence, not all to the first one in the router. So I had the first non wifi one plugged into the router, paired with my other non-wifi one. Then I paired that second one with the new master of the wifi kit (which is just a single port 1,000mbps , no wifi). Then I paired THAT one with the wifi extender one. Finally, I cloned my wifi settings on that last one. The downside is that my 2,000 network is now running at 1,000 because it all has to go at the speed of the slowest part in the network. And the wifi is only extended towards the garden, not towards the loft, because only one half of the TL-WPA7510KIT is actually broadcasting wifi. Otherwise it's pretty plug n play. I seem to have to re-pair them after they've lost power. But now I have the knack, it's simple.

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TL-WPA4220 KIT AV600 Powerline Adapter WiFi Extender Kit, Wi-Fi Booster/Hotspot, Speed up to 300Mbps, 2+1 Ethernet Ports, Powerline WiFi Extender, Wi-Fi Auto-Sync, UK Plug, Plug & Play

TL-WPA4220 KIT AV600 Powerline Adapter WiFi Extender Kit, Wi-Fi Booster/Hotspot, Speed up to 300Mbps, 2+1 Ethernet Ports, Powerline WiFi Extender, Wi-Fi Auto-Sync, UK Plug, Plug & Play

Product ID: 47943715

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Details

Brand
TP-Link
Hardware interface
Ethernet
Colour
Multicolour
Compatible devices
Desktop Game
Product dimensions
5.4L x 9.4W x
Data link protocol
Ethernet

⚡300Mbps Powerline Speed

📶WiFi Booster & Hotspot

🔌2+1 Ethernet Ports

Description

⚡ Power up your home network, no dead zones allowed!

MULTI DEVICE READY - Connect smart TVs, consoles & NAS via 2+1 high-speed Ethernet ports.
ONE TOUCH WI FI CLONE - Create a unified home network instantly with a single button press.
PLUG PLAY SIMPLICITY - Set up in minutes—no tech headaches, just pure connectivity.
SEAMLESS WI FI EXTENSION - Boost wireless coverage to every corner with effortless WiFi Auto-Sync.
BLAZING FAST 300 MBPS POWERLINE SPEED - Stream Ultra HD & game lag-free with HomePlug AV standard tech.

The TP-Link TL-WPA4220 KIT AV600 Powerline Adapter WiFi Extender Kit delivers up to 300Mbps over your existing electrical wiring, extending WiFi coverage seamlessly with WiFi Auto-Sync and a one-touch WiFi Clone button. Featuring 2+1 Ethernet ports for reliable wired connections, it supports multiple operating systems and offers plug-and-play setup, making it ideal for ultra HD streaming, gaming, and smart home connectivity.

Specifications

Brand	TP-Link
Product Dimensions	5.4 x 9.4 x 4 cm; 230 g
Item model number	TL-WPA4220KIT(UK)
Manufacturer	TP-Link
Colour	Multicolour
Wireless Type	802.11b, 802.11g, 802.11n
Operating System	Linux,Windows
Are Batteries Included	No
Item Weight	230 g
Guaranteed software updates until	unknown

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