Lightwave LW450WH Connect Series 2-Way Slave Dimmer, 250 W, 240 V, White Metal, 1 Gang

Works like a charm.This is the second one I ordered, I blew the first one up becuase I ssumed you could wire it in like any old master slave but a live is needed both ends and a 2 wire link to the other end.. I have to split a live off from an adjacent switch. It didnt take long, but definitely read the instuctions!. You can daisy chain quite a few of these so great for large areas.

Great product that is part of a conversion to an old property. Brilliant service back up.

I love these switches. I bought the bridge, master and slave for hallway, one for lounge and one for my external lamps. I give them only a 4* however because my qualified electrician had difficulty putting them in saying my setup wasn't compatible and he had to juggle things around to get them to work.The other thing I will add is that although these are dimmable, they really only dim by about 20%. If you are looking for something to dim quite low, this isn't it. Even at what they describe as 5% (lowest dim setting) it isn't obvious they are dimmed at all and one might assume they are at full brightness. And full brightness is BRIGHT!Final note, I don't think these are accepted by  HomeKit. The app is fine, although a bit fiddly with lots of different sections, but I would love to have that one unified app which deal with everything rather than having to use one app for Nest, another for Lightwaverf and another for Philips Hue. Currently I have my external lamps and hallway on a timer which come on 15 minutes before dusk- very handy.

Quite deep so I had to use spacers to fit in some of my back boxes. Also doesn't dim very low. LED indicator lights not intrusive and useful to find the switch in the dark. I've linked mine to Amazon Alexa which is very easy and now Alexa can turn on/turn off/dim my lights. Good fitting instructions provided.

work well and look good