This very small  video and audio digital  interview recorder is smaller than a disposable cigarette lighter. The mini DVR has a one touch record button for real time video (uses AVI video format  720x480 30FPS  resolution using a CMOS image sensor. Watch the video on your computer with any software that can play AVI files (a codec download maybe required). Just plug the included USB cable into the DVR and an open USB port to view the video. The unit is powered by a built in Lithium-ion battery that is charged when the unit is connected to a USB port with the included USB cable. You can place the camera up high or conceal it down low. With color video with audio, you can clearly see who's there and hear what they say. The tiny size of the recorder makes it ideal for a variety of uses. The DVR also has the added feature of taking still pictures with a resolution of 1600x1200 (JPEG format).  The DVR will record continuously for two hours (until memory is full or the unit is manually turned off).   A 2GB Micro SD card is included and the unit will support up to 32GB max. . The unit weighs 0.67 ounces and measures 2.87 inches x 0.78 inches x .43 inches.