Don't get hung up on the name, there are MANY resellers on Amazon and ebay for Duos. If it looks like this, it's a Duo. Neither of mine are branded Duosida, and I bought one directly from them. It works perfectly on 120 or 240, and I can report that the fault circuit and light function just like OEM, my ELR suffered the charge port micro cracks, and when really wet, it wouldn't charge on my Duos (or my wife's stock 2015 EVSE).Good to know about the Duosidas. Maybe I'm just missing something, but I have tried all of the old links on this forum to the Duosidas on Amazon, but the links all seem dead. Maybe it's a COVID shortage thing?