There is version 1 and 2. V2 has more advanced feature, such as
homecare http://www.tp-link.com/ca/faq-1706.html
link aggregation http://www.tp-link.com/ca/faq-1583.html
And v2 can handle IFTTT too

Well the one I ordered from BestBuy that arrived is V1. I'll be returning it and looking for the V2. Word of advice for anyone else, don't buy online as you won't know what you'll get.

Oh man, I wish I knew that. I got mine from Newegg. I wonder if I can exchange it?

I couldn't find V2 anywhere. Super disappointed. Ended up returning it and got the Asus RT-AC5300 instead. I thought I would give the TP-link a try because of how great my RE650 extender has been. But with these variations in hardware versions, don't think I'll gamble again.

I got my C5400 V2 from Amazon.

I bought one from Newegg.ca. At first it arrived with V1 version. I requested RMA as they advertised in their website that the router supports IFTTT. So Newegg accepted my return and shipped me a V2 version. I am all happy now.