I used an old credit card and worked my way around the device. There is a tab on each side. I am attaching an image showing the tab on the "front" of the case (the side with the alignment arrows for the case). My opening tool is under the tab for that side. I worked my way around it and it popped open. It wasn't the easiest and this little marshmallow will be replaced as soon as FriendlyElec releases a metal case or anything better.