The smallest smart relay I had in my hands! Sonoff MiniR4 Extreme - YouTube
SONOFF WiFi Smart Curtain Switch with Power Metering TUV Certified, DUALR3 Dual Relay DIY Curtain, Blinds, Roller Shutter,Two Way Smart Switch,Works with Alexa&Google Assistant(1 Pack) - Amazon.com
SONOFF Dual Relay Module with Power Metering ,Smart Double Relay Switch for Garage Doors and Boilers,Roller Shade Switch & Light Switch, Supports Google Assistant and Alexa,TUV Certified - Walmart.com
SONOFF MINI R4 Wifi Switch Module 2 Way Switch Smart Home Relay APP Voice Remote | eBay
Sonoff POWR3 high capacity (25A / 5500W) WiFi smart relay switch, with power meter - eWelink Store
SONOFF RE5V1C Relay Module 5V WiFi DIY Switch Dry Contact Output Inching/Selflock Working Modes APP/Voice/LAN Control Smart Home - AliExpress