Defender ST101 Covert Pinhole Color Security Camera Pen with 4 GB USB Memory Video camera & DVR in a discreet, functioning ballpoint pen Looks and writes with a normal pen - no one will know you are actually recording Pen unscrews to reveal a USB drive that you can connect to your PC or Mac Stores up to 3  hours of high resolution of video at a time, which can be archived on your computer Built-in Lithium polymer battery can be charged via USB port