Description_x000D_ Use the existing door without breaking the door structure without the need of drilling, no wiring and installation can be used. The product is equipped with intelligent operating system and user-friendly design. It is easy for old and children to use, to protect your family security._x000D_ _x000D_ Features:_x000D_ _x000D_ 3.5 inch color screen display, see the image of visitors clearly. _x000D_ Wide-angle lens: see everything outside at a 120 degree view. _x000D_ Low consumption and high resolution. It provides an extra security and convenience for you and your family._x000D_ _x000D_ Easy to use: short press to turn on, long press to turn off. _x000D_ 24 hours monitoring with high definition color image sensor._x000D_ _x000D_ Specification:_x000D_ Condition: Brand _x000D_ Resolution: 480 x 320_x000D_ Power Supply: 4 * AAA batteries (Not Included)_x000D_ LCD Screen: 3.5"_x000D_ Door Hole Range: 14-28mm_x000D_ Door Thickness: 40-100mm_x000D_ Indoor Device Size: Approx. 12 x 6.2 x 1.8cm / 4.7 x 2.4 x 0.7"_x000D_ Outdoor Diameter: Approx. 3.2cm / 1.3"_x000D_ Package Weight: 196g_x000D_ _x000D_ Package Included:_x000D_ 1 x Outdoor Unit_x000D_ 1 x Indoor Unit_x000D_ 1 x Screws Set_x000D_ 1 x User Manual_x000D_ _x000D_ _x000D_ _x000D_ Note:_x000D_ Please note that the type and old type of this product will be sent randomly, and make sure you will not mind before ordering._x000D_ _x000D_ This product does not have a doorbell dialogue function, it is only used for viewing the situation outside the door. 13.5 inch display, see the image of visitors clearly 2Wide?angle lens: see everything outside at a 120 degree view 3Low consumption and high resolution. It provides an extra security and convenience for you and your family. 4Easy to use: short press to turn on, long press to turn off 524 hours monitoring with high definition color image sensor