The Moultrie SD Card Picture Viewer is great if your game camera does not have a built-in picture viewer. This viewer features a 2.8" color screen for viewing images in the field. You can transfer images with a USB cable (not included) or directly from your camera's SD card. To use simply pop the original SD card with the pictures or video into the viewer and shut the battery door. Add a blank SD card to the secondary card slot and you can transfer all of your pictures and videos with the touch of a button. This device will accept SD cards up to 16GB and requires 4 AAA batteries for use (batteries not included).