This advanced DVR with built-in night vision is loaded with features and looks just like a passive infrared motion sensor, so it will blend in anywhere in a home or business. It records video in high definition (a resolution of 1280 x 720) to the micro SD card (4GB included). It is powered by AC power so you don't have to recharge it (an adapter with six feet of cord is included). It has night vision so it can record in the dark. It has a motion detector so it can be set to record only when there is motion with a pre-motion trigger which will save the three seconds before the motion started and the three seconds after the motion has stopped.