I wasn't sure if this is the place to put this, but i found and am using one of these;
2 Channels 5-12 V ZigBee Smart Relay Switch
I bought this as it connects via Zigbee and I was hoping it would be a way to get a normal 433mhz fob controlling my HE, and in that it works a treat!
So here's exactly what you can expect;
It's easy to attach to HE via Zigbee, using the Generic Zigbee Multi-Endpoint Switch Drive.
I can control each relay independently, as well as get a status condition of whether they're on or off!
The relays have NO and NC on each and are rated at 10a.. but I probably wouldn't put that much through it!
it doesn't come with a case (which is quite clear on the picture!), but it would be nice nice to have been in a case of some sort, as it's not the most attractive thing, so you'll have to box it up and hide it away!
The fob is easy to program and the buttons tie to a specific relay, it would be nice to be able to have the fob independent of the relay control, so you can get fob activation and relay status separately, this means if you want to have 2 buttons to set/reset the alarm, as well as activate an external alarm box, you'll need to have a couple (but they're cheap for what they are!)
The fob range isn't great, expect about 4 or 5m max, so you'll have to install it near where you plan to use it!
The power is nice giving you lots of options, for either 5v USB or 7-32v AC or DC.
Over all for the price, I think it's an excellent buy, clearly, I've only had it a few days, so we'll see if it holds up over time!
There are probably a load of these things about, but this is the first I've seen and used! And as it enables you to both control standard relay and/or have a fob on your system to do stuff (set an alarm, open a garage or door, trigger a more complex routine etc!), i thought it a good find!