- When visitors press the door bell button on the door viewer camera, door bell will ring inside of the room. At the mean time, the screen inside the door will turn on automatically to show the outside images and will last for 20 seconds then turns off. Also as the door bell is pressed, the door viewer camera will automatically take 2 photoes for the visitors and the photoes will be stored in TF card in case the host is out, so as to check the visitors' information or to use the information in other secure.

- There are 4 options to choose in screen menu: 10S/20S/30S/OFF. 20S is the default mode, which is the best option for balancing the power consumption and operational convenience. OFF mode is for laboratory test and for customers with special needs.

- Press the power button, outside image will be shown in the screen. When the user is check outside with this product, photos or videos can be taken at the same time. After turning on the product, one more press on the power button, the product will be turned off.

- Bell ring setting has two levels for the ring volume. The door bell also can be turned off into a DND (do not disturb) mode.

- This product has an infrared function, which enables user to observe outside images in the night. Due to the image-forming principle, all images shown on the screen is black and white form, which is normal situation,

- Easy mounting, no tool required: replace the existing door viewer or drill a 14mm hole in the door at the required height. Ensure the bell push is at the bottom and adjust so that the camera is perpendicular to the horizon. Stick the screeen holding plate with 3M stickers.

- Specifications: door thickness:40-70mm; camera: 0.3 mega pixels; power: 4 AA batteries; 2 GB Micro SD card (photo volume about 30000 photos).

*Upon request. Delivery within 4 weeks.