Infrared sensor, automatically start video and audio, AVI,JPEG SD card storage: 32G and 256M ... , Detail Specification of Door ViewerSenser :Infrared sensor,auotmatically start the video and audioOptical lens:View Angle 54 degreesLCD Screen:2.5TFTPower ... THE L/C FOR MASS ORDER, 10DAYS FOR SAMPLE. TFT Digital Door viewer