It's name is : R4i SDHC 3DS Upgrade.
It's a clone of an R4, with poor official support.
In fact, upon going into that site listed on the box, the page was a mess.
And the last upgrade it did had been a while. Seems to be abandoned since.
I'm not sure if YSMENU/TTMENU supports that cart as it's secondary firmware or not.
Haven't checked the compatibility listed by RGF.
If it's listed in the compatibility list, then at least it's still good enough.