SONOFF Smart WiFi Light Switch 10A 2200W, Smart Switch Universal DIY Module for Smart Home Automation, Works with Alexa & Google Home, Compatible with eWelink IFTTT, No Hub Required, BASICR2, 4PCS

Easy automation for the price of a couple of drinks!The four units supplied in the package work without any hardware setup being needed, apart from connecting the supply.I have not tried a second set of four so cannot comment on if they will interfere with the first four, or simply be registered as new devices.Note: You do need to set your mobile phone to a 2.4GHz Wi-Fi connection to recognise the device during setup.

I learned of this from a colleague. Pack of four is excellent for our small business. Gives us remote control of the careless users of utilities!

Make sure you wire them the right way around! I initially failed to do this and became very frustrated that I could not get them to work! For some reason, the orientation of the label has led me to wire another one up the wrong way around too.While they are clearly marked 'input' and 'output' I have managed to make this mistake more than once.However, once I got them wired correctly the rest was very easy.The app is really easy to use and is quite instinctive. It provides masses of programable options that can be tailored to the needs of most people.My advice would be to set up a test rig of a power source, connected to one of these smart switches then onto a lamp. This way you can get to play with one of these switches and program it and rename it etc. Once you have done one the rest are really easy and just add them to your app with the easy quick pairing option. I found the instructions here a bit confusing. But also found that if I got the app open, then powered up the switch then pressed pair on the app they quickly connected. If you have linked one of these to Alexa, then each additional one comes available on Alex as you add a device to the app.They can carry 10amp so are fine for most things you might want to be able to control from a distance.These would be ideal to secretly wire into the circuit of a teenager's music system or another device you did not want them to be using for hours on end. Then the power to the offending device could be turned off from a distance!

Really good works I’ve had this before and they rarely give up on me. Good product

Found these some years back and have used them in my own home and clients. These particular devices are best installed in a suitable electrical enclosure as the cable clamps and space for termination are not the best. They do however work very well and are voice activated compatible with alexa and some other voice controlled devices.

Have added quite a few of these round the house now. Easy to set up and link to Alexa for voice control and timing. As someone else reported I found it best to pull out and snap off the little metal tags under to connection screws to get a better grip of the wires.

Really easy to install and work perfectly. No problem with Alexa etc. The terminals are a bit small and fiddly which is why I dropped a star but otherwise really good.

I have several of these. This to replace one that was water-damaged and to install some more.