【4MP High-Definition Camera】Equipped with a 4-megapixel camera, delivering crystal-clear 1440P ultra-high-definition video quality for superior surveillance. 【Night Vision Capability】Features built-in infrared night vision with a 20-meter effective range and an F1.7 large aperture, ensuring clear imaging even in low-light conditions. 【Two-Way Audio Communication】Integrated microphone and speaker enable real-time, two-way voice communication for seamless interaction with visitors. 【Battery-Powered & Energy Efficient】Low power consumption design with built-in battery eliminates wiring hassles, while local SD card storage ensures data security. 【Motion Detection & Alerts】Equipped with PIR sensor for motion detection, instantly pushing notifications to your device when abnormal activity is detected. 【Weatherproof Design】IP65-rated waterproof ABS material body, suitable for both indoor and outdoor installation, operating in temperatures from -10°C to 50°C. 【Wide-Angle Lens】130° wide-angle lens provides a comprehensive view of your entryway, reducing blind spots and enhancing security coverage. Specifications: Processor: 32-bit RISC Master Operating System: Linux Image Sensor: 1/3" CMOS sensor Resolution: 2560*1440 (1440P) Minimum Illumination: 0.1LUX/F1.2 Lens: 2.8mm focal length, 130° viewing angle Battery: 2x 18650 batteries (2000mAh each) Standby Time: Approximately 6 months with 2x 2000mAh batteries Charging Input: DC 5V1A Video Compression: H.264 Frame Rate: 20fps Night Vision: Infrared, supported Audio Protocol: G711U Local Storage: Up to 128GB TF card Wireless: 2.4G (11bng) mixed Network Setup: QR code configuration Simultaneous Viewers: Up to 5 Alarm Triggers: PIR motion detection, doorbell button Operating Temperature: -10°C to 50°C Power Consumption: 1.5~5W (1.5W during daytime) Standby Power Consumption: Operating Humidity: 10%-90% RH Compatibility: Supports Android and iOS (SriHome app)