Feature: 1. Integrated design, all-metal casing, compact structure and high reliability. 2. CMOS sensor, all‑glass 1MP HD lens, supports multiple video formats up to 1280 x 720P. 3. Support PIR human motion detection, ensures home safety. 4. Wide dynamic and low light function, support automatic change to black color. 5. 4pcs 850nm infrared lamps, infrared distance 1‑2m, using PMW split technology. 6. 4.3‑inch low 8‑bit TFT LCD display, internal 4 ringtones and 3‑level adjustable volume. 7. Support video mode or camera mode, auto power off function, support manual image capture. 8. Equipped with DC3.7V 1800MAH litpo battery, low power consumption and long standby time. 9. Easy to install through the observation hole reserved on the door. 10. EEPROM data storage mode, no stored data will be lost after power off, maximum support 32G high-speed memory card. Specification: Item Type: Door Viewer Material: ABS + Zinc Alloy Monitor Color: Black Image Sensor: 1/4in CMOS Effective Pixels: 1280 (H) x 720 (V) Minimum Illumination: 0.5lux / F2.0 (Colorful), 0.02lux / F2.0 (Black and White) White Balance: Automatically Track White Balance Gain Control: Automatic Signal to Noise Ratio:> 50dB Backlight Compensation: On Wide Dynamic: Yes Electronic Shutter: 1 / 4-1 / 10,000s Day / Night Mode: Filter Color to Black Focal Length: 2.4mm Horizontal Viewing Angle: 140 ° Aperture: F2.0 Infrared Night Vision Lights: 2pcs, 3mm, Flat Head, 90 °, 850 Infrared Lamp Auto Power Off: Off, 10s, 20s, 30s Languages: Chinese, English Motion Detection : Supported Display Settings: On / Off Recording Time: 10s, 20s, 30s Number of Photos: One, Two, Three Format: Support Formatting Memory Card Light Source Frequency: 50HZ / 60HZ Power-off Memory: Support Default Setting: Support Ringtone Settings: Built-in 4 Ringtones Volume Setting: 3 Levels Optional Main Chip: JR Infrared Body Sensor: PIR Sensor Pir Sensing Mode: 9.5mm Fresnel Lens LCD Screen Type: 4.3 LCD Screen Resolution: 480 x 272 Mmeory Card: Support Up to 32G (Not Included) Maximum Image Size: 1280 x 720 Frame Rate: 50HZ: 25 Frames (1280 x 720P) Video Compression: M-JPEG Audio Compression: G.711 / 16kbps Standby Current: 80UA Working Temperature: -30 ° C - 65 ° C (outdoor) / -10 ° C - 50 ° C (indoor) Working Humidity: <90% Installation: Screws and Ceiling Applicable Door: Approx. 40 - 110mm/1.6-4.3in Applicable Door Viewer: Approx. 15 - 50mm/0.6-2in Display Size: Approx. 136 x 83 x 14mm / 5.4 x 3.3 x 0.6in Door Viewer Size: Approx. 62 x 62 x 15mm / 2.4 x 2.4 x 0.6in. Package List: 1 x Indoor Display1 x Outdoor Viewer6 x Screw1 x Mounting Plate1 x USB Cable1 x 3.7V 1800ma Lipo Battery1 x English User Manual