These light-weight and stylish sunglasses actually contain an integrated, hidden DVR that records audio and video with a resolution of 640x480 at 30 frames per second. Or it can take pictures with a resolution of 1280x960. The DVR sunglasses come with 4 GB of memory and can support up to a 8 GB SD card (not included). A built-in rechargeable Li-polymer battery will power the DVR for approximately 5 hours. Once you have recorded video (or pictures) just plug the glasses into a USB port on your computer using the included cable and view your video with any software that supports AVI files. This device is ideal for any situation where one might want to take photographs or movies without carrying a digital camera, or if you need the convenience of recording hands free, such as on vacation, touring, skiing, sporting events, etc. It is perfect for private investigators, police detectives, security guards, secret shoppers- anyone who needs to take video or pictures discreetly. The kit comes with a hard shell carrying case, lens cleaning cloth, USB cable and AC adapter. The DVRSG will be recharged every time it is plugged into a computer but it can also be recharged with the included AC adapter.