Firts off...

I have a TP Link TL-SG108E 8 Ports Easy Smart Switch. 

But for some reason, that model was not available in the drop down menu.

I recently purchased this switch and am a little confused on which hardware version it is. I need to know to perform and firmware updates. I will add in photos of the box, the bottom label of the switch and what is shown on the management interface.

What confuses me is I see a reference on the interface of Hardware Version 6.0, but on the box and bottom of the switch, I see a reference to a 6.6 as shown in the photos.

I'm new to TP Link products after decades of using Linksys, so please forgive my ignorance.