SwitchBotSmart Relay Switch 1,Smart Relay Module with Built-in Hub, Wi-Fi&Bluetooth Switch Compatible with Alexa/Apple Homekit/Google Home/Matter Hub Required, 2.4GHz, Home Automation

Easy to initiate into the Switchbot system. The contacts are dry. (Isolated) which greatly enhances the usefulness. Can be powered from just about any voltage. Contacts are rated at 16 amps but getting any conductor larger than 16 gauge in that tiny connection is a loser. Bluetooth lag time on activation could be an issue if you have a lot of other devices on line.

The relay switch is a smart little device! It's great. It allows you to turn on any plug or light into a connected device basically. Then it becomes integrated into Switchbot ecosystem (and because it's matter compatible, into the whole smart home system) and you can automate whatever it's connected to. I've got it attached to my foyer lights so they turn on when I unlock my front dooor. I'm not good with electrical stuff but it was pretty easy once I was able to figure out which wires were which. I will probably get another one to use for my garage door.

This Relay 1PM is an interesting smart switch. It can switch 100-240 V AC with energy monitoring, or 24-30 V DC, can be controlled by Matter hubs, and works as a Bluetooth hub for Switchbot-only devices. It lacks 12V and 48V support, and doesn't work on low-voltage AC, which would have been nice for HVAC use. I'll be using it for AC devices where energy monitoring gives insight or is useful for automating things or catching problem conditions.Connected easily with Switchbot app. App can be connected to Google/Alexa/etc. or Matter can then be enabled and connected to any Matter hub. This worked as a Switchbot hub and worked with one of my Switchbot Bluetooth temperature/humidity meters. App automations can run when power draw exceeds or goes below a settable value, and can of course turn relay on and off in response to other conditions from other Switchbot devices.Power draw at 24 V DC is 15 mA (0.4 W). I tested 24 V AC and it definitely doesn't support low-voltage AC, only low-voltage DC (and high-voltage AC). I also confirmed it does not work on 12 V DC (purple version does support 12V). Power reading was fairly accurate, within 1 W of another power power meter. Energy monitoring lists watts, amps, and volts.Instructions are multi-lingual, with each step in every language (rather than separated into different sections) so it's hard to follow. They are also tiny.Issues:- No low-voltage support for 12V, 48V, or low-voltage AC, e.g. 24V AC.- Matter use requires first pairing with Switchbot app to enable Matter connection. This eliminates a big benefit of Matter: working even after manufacturer's servers are no longer around.- Energy monitoring only works for AC power; DC just shows zero.- Automations running on power draw are limited to thresholds of 1, 2... 9, 10, 20... 90, 100, 200... 1400 W, so for higher levels you can't fine-tune.

Another switchbot device that works as advertised. Relay is quick to respond via app and Alexa.

Incredibly simple to use, easy instructions - works well to retrofit any device that isn't natively smart. great addition to the switchbot smart ecosystem! Size is great - fits just about anywhere. Instructions are no brainer and the box provides good details.

What an innovative little device that allows for automation of a switch or plug at the source AND can provide power metering as well.

Works great to control a vent damper as a dry contact relay.

They are amazing