Sharp Video W/Audio - The HeadCam records full-color video with crisp and clear VGA (640 x 480) resolution at a heart pounding rate of 30 frames per second to catch all of the action. The built-in microphone picks up even the faintest sounds - adding dialogue to your footage. * Weather Resistant - Because the HeadCam was designed to capture all of your outdoor adventures - it"s water and weather resistant and you actually have to try to damage it. About the only thing you can"t do with the HeadCam is go scuba diving. * Expandable Memory - The HeadCam has a maximum internal memory of 64MB and is expandable up to 16GB with a MicroSD card for hours of entertainment recording. * Secure-Fit Headband - The HeadCam comes with a fully adjustable headband that easily and securely around your head or protective helmet. * Interchangeable Batteries - Rechargeable batteries don"t do you much good if you have no place to recharge them. You can quickly change out 3 AAA batteries to keep on keeping on while allowing for several hours of recording.