Received this today from Camrise who is apparently a DJI authorized dealer. I've never heard of this place let alone ordered anything but it looks like a memory stick and came with no identifying info or receipt. Anyone else get one or know anything about it? I'm sure as heck not going to plug it in until I know.

Its a Micro SD to USB adapter aka card reader.

Hi there. Thank you for reaching out. This item is a Micro SD card to USB adapter and it can be used to transfer files from your SD card straight to your PC or Mac. Have a nice day ahead and take care always!

Interesting thing for when you have a lot of Micro SD cards!