1) 3.5 inch color TFT display

2) Peephole barrel: 12mm (large peephole barrel can be done)

3) Fits any door 35-65mm thick

4) Sensor: 300, 000pixels

5) Press call button, red LED light turn on, door chime ring at indoor display. Press monitor button, the display turn on

6) Press monitor button to turn on the display to see outside anytime

7) The display will turn on 8seconds, then become back

8) When adjust the melody, the display which turn on can last 20seconds

9) At the bottom of display, left button is to adjust sound volume, the right button is to adjust melody

10) 16PCS melody for option

11) Can press monitor button by 1500PCS at least per 3PCS AA battery (battery not included)

12) "Don't disturb" function: When hold monitor button of display for seconds without loose, then the screen turn off, loose; So the adjustment of "don't disturb " is finished. When in "don't disturb " function, anyone press call button, indoor display have no door chime sound. Cancel "don't disturb function": Just hold monitor button for seconds until the screen turn on