45AHD 4.5 inch Motion Detection Camera Video Smart Digital Door Viewer 1. Image Sensor: 14 CMOS 2. Effective Pixels: 1920x1080 3. Minimum Illumination: 0.5 LuxF1.6 Color 4. Signal-to-Noise Ratio: Greater than 50dB 5. Electronic Shutter: 14-110,000s 6. Focal Length: 2.4mm 7. Horizontal Angle of View: 140 degrees 8. Aperture: F2.0 9. Infrared Night Vision Lights: 4, 3mm, flat head, 90° angle, 850 infrared light 10. Supported Languages: Chinese, English, French, German, Spanish, Portuguese, Italian, Russian, Hebrew, etc. (Built-in languages may vary between versions; customizable languages available) 11. Recording Time: 10 seconds, 20 seconds, 30 seconds 12. Light Frequency: 50Hz60Hz 13. LCD Resolution: 480x854 14. TF card: Supports up to 32GB (not included) 15. Video compression: H.264 16. Protection rating: IP55 17. Battery: 3.7V3500mAh lithium battery 18. Wide dynamic range and low-light capabilities, with automatic color-to-black transitions 19. Utilizes a 32-bit processor and professional video codec chip 20. Infrared range of 1-2 meters, four 850 infrared LEDs, and PMW spectrometer technology 21. Built-in RTOS operating system, fully supports UI menu-based configuration and management 22. Supports video and photo modes for security purposes 23. Supports PIR motion detection and manual image capture 24. Integrated design, compact structure, and high reliability 25. Installs quickly and easily through a pre-installed peephole in the door 26. EEPROM data storage ensures data is not lost even after a power outage