Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: What is the adapter for?
Document: The case has a a mesh pocket that holds the battery and memory card adapter. Good snug fit around the camera.
used on my Samsung Galaxy S3, did not introduce any enhancement to the performance (R/W) compared to the 9$ made in china class 6 memory card.
i had quite an experience getting this product. I ordered the white cover and i arrived as a white cover but the cutout for the camera wasn't what the picture showed. The portion that shows the carl zeiss logo was covered and it isn't in the picture when ordering. then the seller told me that they started making the product differently. i eventually had to settle for a green one. It is what i thought it would be.
great product...set it and forget it as they say. make sure you have the proper amount for humi. size and amount of cigars.
great for use in go pro camera in hunting.
You don't need more than this if you are in a real world. Very good for almost every game, I have a GTS-450 and everything run fine! Memory speed isn''t an issue: mine is at 1400 MHz (a little bit more than 1333 MHz, it's still pretty fast).
Works as expected. Good price.
Works as a described!
Workd great for iPhone 4s BUT, won't always charge other iPhones and won't charge iPad at all! Dissappointed by that!
This product worths the price! It has a Hi-Fi sound, loud and clear!! !I really liked this one, giving one for gift.
Answer: You need the adapter to insert the micro card into your computer. Computers use full size SD cards while phones use the micro SD card. To move data from one to the other you require the adapter.