Function: 1. VIDEO CALL: When a person outside the house presses the doorbell, video images from outside the house will appear on the display. Even if the elderly and children at home do not have mobile phones, they can check the situation at the door by simply checking the screen. 2. HI FI MICROPHONE: Supports two-way gos, with high-power host and high-sensitivity microphone, the connection is clear and sumptuous. In addition, it supports the regulation of the level of hospitality without disturbing the family. 3. HD LENS: This doorbell is equipped with a wide-angle fisheye lens with a 170 angle and 8MP resolution, which provides the peny with an image of the situation in front of the door, so that there is no "dead safety angle" in front of the house, nor many guests can be seen. 4. DAY AND NIGHT: Built-in high-power infrared night vision world, combined with ICR infrared filter, can automatically switch between day and night mode. Even in dark environments where you can’t see your fingers, you can still see clearly. 5. HIGH-CAPACITY BATTERY: The bell and display screen are equipped with high-capacity batteries. Even if there is a naked power failure in your home, a doorbell and low-power display can still work for a while and still protect the safety of your home. 6. WATERPROOF AND ANTI-THEFT: The doorbell is dust and water resistant with IP66 rating. There are mounting screws between the bell and the waterproof housing. Using screws to punch holes to install the doorbell avoids the doorbell being stolen. Specification: Item Type: Video Doorphone Matter: ABS Lens pixel: 8 MP Lens Type: Large, wide-angle fisheye lens 170 Night vision distance: 5-10m/16,4-32,8ft Pickup distance: 5m/16,4ft Memory Type: Maa Memory Card (Done) (Maximum Support 256GB) Bell Camera Battery Type: Lithium-Ion Battery Bell camera battery capacity: 1000 mAh (built-in) Display Battery Type: Lithium-Ion Display screen battery capacity: 400 mAh (built-in) Advertising Port Type: Type C Wi-Fi version: 2,4 GHz Waterproof rating: IP66 How to use: First of all, open the switch on the side of the display, at the same time press the dugo ding-dong button on the bell and the M button on the display, see how the light flashes, wait a while, the bell and display will be automatically connected when the connection is complete, they can be displayed on the screen, you can save the video to make it easier to return to viewing after driving the memory card. List of packages: 1 x Video Doorbell 1 x Doorbell Board 1 x Display Screen 1 x Ad Cable 1 x Operating Instructions 1 x Large Sticker 1 x maa sticker 6 x Expansion Tube 6 x Screw 1 x maa screw