Feature:1. Display Viewing: Outsiders outside the house after pressing the doorbell will be able to display the video screen outside the house, the elderly and children at home without a cell phone, check the display will be able to know the door situation.2. HiFi Microphone: This video doorbell adopts two way talk design, with high power speakers and high sensitivity microphone, the door visual call is clear and stable, support the adjustment of the volume, do not disturb family members.3. High Definition Lens: Video doorbell with 170 wide angle lens to make the door in front of the situation as clear as possible, so that no security dead ends in front of house, multiple visitors can also be seen one by one.4. Day And Night Camera: Built in high power infrared night vision light, combined with ICR infrared filter, can automatically switch day, night mode. Even in the dark environment where you can't see your fingers, you can see clearly and camera can shoot clearly.5. Built In Battery: The doorbell and display are equipped with a large battery, even if the home suddenly power outage, low power doorbell and display can still continue to work for a period of time, and continue to guard your home security.6. Waterproof And Anti Theft: Our doorbell supports IP65 level dustproof and waterproof, there are fixing screws between the doorbell and the waterproof shell, use the screws to punch the holes to install it to avoid the doorbell being stolen.Specification:Item Type: Video Doorbell SystemMaterial: ABSDisplay Screen Size: 4.3 InchesLens Pixels: 8MPLens Angle: 170Night Vision Distance: Approx. 5-10m / 16.4-32.8ftSound Pickup Distance: Approx. 5m / 16.4ftDoorbell Battery: Lithium Ion Battery 1000mAh (Built in)Display Battery Type: Lithium Battery 400mAh (Built in)Storage Card: Memory Card, Maximum Support 128GB (Not Included)Charging Interface Type: Type CWireless Fidelity Version: 2.4GhzWaterproof Grade: IP65.Package List:1 x Doorbell1 x Doorbell Backboard1 x Display Screen1 x Display Screen Backboard1 x Charging Cable1 x User Manual2 x Adhesive Tape6 x Expansion Plug6 x Screw1 x Small ScrewNote:1. The doorbell has built in battery, which can be recharged repeatedly. Press the doorbell 5 times a day for 10 seconds each time, it can last for about three months. 2. The doorbell works in a way that when someone presses the doorbell, the camera starts and connects to the display screen. If no one presses the doorbell, the display screen will not work and the camera will not activate. 3. To ensure stable connection, the doorbell is point to point connected with the display screen, so it does not support third party devices such as phones, computers, tablets, etc. 4. Security is guaranteed when installed with screws. After fixing the doorbell bottom with screws to the backplate, the connection is very tight and it cannot be taken away directly unless forcefully disassembled. 5. Regarding transmission distance and usage conditions, the doorbell uses 2.4G Wireless Fidelity connection. The unobstructed flat transmission distance is up to 30m/98.4ft, but if there is wall obstructing, the distance will be halved, (some strong magnetic doors have strong signal shielding properties, which may cause no signal, please avoid installing directly on the door).