SONOFF 4CH Pro R3 Wi-Fi Smart Switch 4-Channel Din Rail Mounting Home Automation,Self-Locking/Interlock Control Home Appliances, RF/APP/Voice/LAN Control, Compatible with Alexa(2 Pack) - - Amazon.com
4CH Sonoff 4CH Pro-WiFi&RF; Smart Switch User Manual 4CH pro 说明书x ITEAD Intelligent Systems
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4CH Sonoff 4CH Pro-WiFi&RF; Smart Switch User Manual 4CH pro 说明书x ITEAD Intelligent Systems