SONOFF 4CHProR3 Wi-Fi Smart Switch,4-Channel Din Rail Mounting Home Automation,Self-Locking/Interlock Control Smart Home Appliances, Works with Alexa Google Assistant | Walmart Canada
4 Button Smartify Dual WiFi Smart Light Switch - White
4 Gang TUYA WiFi Smart Switch Module 1/2 Way Smart Life APP Alexa Voice Control | eBay
4-gang Wi-Fi Smart Switch with RF Control – Lion Guard LLC