This is the worlds only swim mask that has an integrated waterproof digital camera, eliminating the need to carry an underwater camera, keeping your hands free as you swim. The 3.1 MP camera can operate to a depth of 15ft / 5m, making it ideal for use when snorkeling or in swimming pools. The goggle lenses are made of tempered glass and have integrated crosshairs that help you to line up shots. Turn the Camera on, and choose a mode with the upper button. Simply press the shutter button to record pictures or videos. An LED inside the mask tells you if you are in still image or video mode. Downloading images is as easy as plugging in the mask to your PCs or Macs USB port (USB cable included). The included software (PC only) allows you to edit your content. The built-in 16 MB memory can store up to 30 high resolution pictures or up to 52 seconds of video. A microSD card slot allows you to expand memory up to 2GB for additional pictures or videos. Requires two AAA batteries.