The video doorbell is one of the smallest sizes in the industry, and the designer specially designed it according to the size of the American home door frame. With video intercom, photo, video, night vision, PIR and other functions to make your life more convenient. ^HD AND 166WIDE VIEWING ANGLE HD doorbell camera with wide viewing angle in real time, so you won't miss any visitor.. Send a message as long as motion is detected during the day and night. Night vision mode will switch automatically. ^ Smart PIR Motion Detection and Night Vision Wireless Camera Doorbell is smart PIR motion detection: an alert is sent as soon as motion is detected or a visitor presses the doorbell. Choose from low, medium, and high sensitivity within 11.48 feet. Ringtones so you never miss a visitor. Day or night, rain or shine