Item Type: Video Doorbell Material: Acrylic Sheet + Zinc Alloy + ABS Application: Home, villa, community Voltage: 100-240V Display: 7-inch high-definition LCD display Resolution: 800x400 Ringtones: 15 Camera: CMOS color digital high-definition camera Night Vision: 4 LED infrared night vision lights Best Distance for Night Vision: Approx. 0.2-1m/7.9-39.4in Wiring Mode: RVV4 core wire connection Working Temperature: -20 to 60 Package List 1 x Outdoor Machine 1 x Indoor Machine 4 x Access Control Card 1 x Doorbell Waterproof Shell 1 x Fixed Plate 1 x Power Adapter 7 x Screw 7 x Expansion Tube 4 x Terminal Line 2 x Manual 1Video intercom, powerful function, directly connected to the indoor unit, simple operation, stable signal, clear image, suitable for multihousehold use. 2The 7inch largescreen internal phone touch screen operation is convenient and quick. You can view visitors without a mobile phone at home, control unlocking, and the elderly can also use it. 3White light night vision, automatic fill light, automatic light sensitivity, in the case of insufficient light, automatically turn on the white light, so that you can clearly see visitors at night. 4The metal body is rainproof and dustproof, sturdy and durable, not easy to be deformed, and the rainproof cover is designed to prevent the outside machine from being attacked by rain and dust. 5Support access card unlocking and indoor display unlocking. Equipped with 4 access control cards, more suitable for family use and more convenient to use.