Megapixel: With a professional security camera, you can restore picture details better, giving you a great visual experience. 120°Wide-angle Lens: Equipped with a 120°wide-angle lens, clear insight into the details outside the door to reduce safety hazards. Fashionable design: Fashionable and classic design, simple features, it is suitable for European and American aesthetics. Invisible camera: Using invisible camera with a similar appearance to the traditional peephole, with one-click viewing without storage to protect privacy. outdoor sub-machine: materials is vandal-proof, it can prevent human damage to the maximum extent. Note: 1. Please confirm the power of the AAA battery before use, it is best to use a battery. Please confirm the positive and negative poles of the battery during installation. 2. This doorbell is simply peephole doorbell. You cannot link your mobile phone and WiFi. The outdoor machine does not have a button. Please choose as needed!!! 3. First install the battery, then connect the lines, and finally start the test and use it. 4. This product doesn't support night vision. Material: plastic+metal colour: As Shown Package Contents: 1 x Indoor host 1 x Outdoor cat's eye camera 3 x screw (L/M/S) 1 x Metal hanging board 1 x English User Manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.