When it comes to building a smart home, there's one device that everyone needs - and that's a smart plug. Fortunately, Amazon's Prime Day sales have just the candidate for such an occasion - the TP-Link smart plug.

It's reduced on Amazon US to just $11.68, which is about the cheapest it has ever been - 30 per cent off the list price. In the UK it's down to £13.99, again a 30 per cent reduction over the normal price. 

So why should you be looking at the TP-Link smart plug? Because it's compatible with Amazon Alexa (or Google Assistant) and it doesn't need a hub to work. It's part of TP-Link's Kasa system, meaning a swift set-up using your smartphone and then you can connect it to your Echo or other device for remote control - so it's hassle free and very versatile.

It's really easy to use - and if you just want a smart plug, you can also use it via the app to set timers or turn on and off using your smartphone. In fact, it's such a great plug, we've bought several of them ourselves.

Smart plugs are ideal for remote control of heating or air conditioners, lamps or even lights for the Christmas tree.

The Prime Day sales will only be on into 16 July, so you'll have to move fast. We've rounded up some of the best smart home deals right here, or you can look at the best deals for the US or the best UK Prime Day offers