7in 2‑Wired Video Intercom Doorbell Fingerprint Password Card Unlocking Night Vision Security 100-240V Item Type: Video Doorbell Material: Aluminium Alloy+ABS Plastic Outdoor Camera: Aluminum alloy external device with white LED night vision goggles Camera: 1/3in CMOS 1000TV line Viewing Angle: 92° Minimum Illumination: 0.5LM Unlock Type: Support 500 fingerprints, 1000 IC card unlock, password unlock Connection Method: BUS 2-wire Installation Method: Wall-mounted Working Temperature: -30°C-50°C Size: Approx. 200x100x55mm/7.9x3.9x2.2in Monitor: Screen: 7-inch LCD Effective Pixels: 800 x 480 Connection Method: BUS 2-wire Size: Approx. 238x169x24mm/9.4x6.6x0.9in How e:  1. The indoor unit, outdoor unit, and power supply are connected by cables, and the power cord is connected to the electricity. 2. Adjust the color and brightness of the display, and use the intercom function of the doorbell. 3. Connect the electronic lock at home to open the doorbell.