Q20 mini video recorder includes PIR sensor, CMOS camera lens, Micro SD card and infrared LED lights. It can detect infrared body motion As soon as it detects body motion, the Q20 will auto-record a video (including audio) for 30 seconds even in darkness environment with the help of infrared LED lights. The videos are stored on the built-in SD card. User can replay the videos by connecting the Q20 to a computer via a USB cable.