Item Type: Door Viewer Material: Plastic + electronic components Display Size: Approx. 13 x 7 x 2cm / 5.1 x 2.8 x 0.8in (1-2cm) Camera Size (without wire length): Approx. 6 x 6 x 5cm / 2.4 x 2.4 x 2in (1-2cm) Camera Cable Length: Approx. 15cm / 5.9in Display Battery Model: 4pcs AAA battery (Not included) With Doorbell Function Visual Angle: 90 wide Angle Lens Pixel: 300,000 High definition camera Package List 1 x Camera 1 x Display 3 x Screw 1 x Manual 1With doorbell function, 180 days long standby time, simple design and convenient operation, suitable for home use. 2300,000 Pixel high definition camera and 90 degrees view angle, Simple design and easy operation. 3When there is insufficient light, the infrared night vision mode will turn automatically to ensure seeing the visitors clearly even in the dark night . 4Suitable for household use that you can see who is outside the door clearly, make you feel safe for unknown visitors. 5Children and senior friendly. Also great for house guests, low power consumption and long standby time.