Home mode: When the visitor presses the doorbell button outside the door, the machine rings and lights up, automatically taking pictures to store visitors Departure method: press the doorbell button to make the first beep, automatically take photos to pay attention to the visitor, the screen does not enter the monitoring state Do not disturb: When a visitor presses the doorbell button outside the door, the machine does not ring the doorbell and automatically takes a photo to store the visitor. After taking a photo, save the picture on the memory card, you can browse the computer or use the card reader through menu items. When an indoor person presses the switch button, the machine will turn on and display all outdoor conditions on the large screen. When the machine is turned on, when the screen is displayed on the screen, the indoor person presses the watch button again to complete the photo. The screen will automatically be saved on the memory card. Features: Equipped with DC 3.7V, 1800 mAH lithium battery, battery life is long-lasting, don't worry about changing battery for a short time. Standardized design, compact structure, high reliability, high quality products give you high quality assurance. It is convenient and quick to install through the view hole reserved on the door, and it does not need complicated installation, and it is ready to use. Supports up to 32G high-speed memory card, using EEPROM data storage mode, the data stored after power off will not be lost. Specifications: Condition: Brand New Material: ABS Color: Black Support door hole: 1.5-3.5 cm /0.6-1.4 in Support door thickness: 3.5-11 cm / 1.4-4.3 in Peephole size: 6 * 6 *1.5 cm / 2.4 * 2.4 * 0.6 in Peephole column size: diameter 1.5 cm / 0.6 in Peephole column length: 3 cm / 1.2 in Display size: 13.5 * 8 * 1.3 cm / 5.3 * 3.1 * 0.5 in Focal length: 2.4 mm Horizontal viewing angle: 90 degrees Signal to noise ratio: greater than 50 dB Electronic shutter: 1 / 4 - 1 / 10,000 s Image sensor: 1/4" CMOS (1143) Effective pixels: 1280 (H) * 720 (V) Minimum illumination: 0.5 / F 2.0 (color); 0.02 / F 2.0 (black and white) Monitor: System: Built-in RTOS operating system, support UI menu configuration and management Video recording: support video recording mode or camera mode recording Recording mode: 10 seconds, 20 seconds, 30 seconds Camera mode: one shot, two consecutive shots, three consecutive shots Automatic shutdown time: 10 seconds, 20 seconds, 30 seconds, off Motion detection: support PIR human motion detection Image acquisition: support manual image acquisition LCD screen: 3-inch low 8-bit TFT Ringtone: offers a variety of built-in ringtones Camera: Pixel: HD CMOS sensor Lens: M7 full glass 2MP pixel HD lens Detection: Dynamic low illumination, support for automatic color to black Parameters: 32-bit processor and professional video codec chip Infrared distance: 1-2 meters Package List: 1* Indoor Doorbell 1* Outdoor Unit 1* Data Line 1* Installation Package 1* Battery 1* Instruction Manual .