Feature:1. High Definition Monitor: Ultra thin indoor monitor, high definition, its ringtone volume, call volume, brightness and color are adjustable.2. Outdoor Camera: The camera has white light LED night vision. With rain cover, weatherproof, moisture proof and oxidation proof. And it use BUS 2 wire connection.3. Stainless Steel Electric Control Lock: The lock is rustproof and durable. Support electric control, key and manual unlocking, effective anti theft.4. Multiple Functions: The video doorbell kit has functions of monitoring, calling, unlocking, do not disturb, and group calling, which brings you a lot of convenience.5. Built In BUS Power Supply: Built in BUS power supply, AC 100240V input voltage, DC 24V 2.5A output voltage, stable and reliable.Specification:Item Type: Video DoorbellMaterial: Aluminum Alloy, ABS, Stainless SteelUses: Can be used for apartment, villa, hotel, office, public building video doorbellOutdoor Camera Parameters:Wire System: BUS 2 wireCamera: CVBS 1000TVLLED: White light LEDPower: Standby 0.1WEffective Distance: 100m (2 x 0.75mm)Angle: 92Working Temperature: -20-+60Indoor Monitor Parameters:Wire System: BUS 2 wireScreen Resolution: 1024x600Effective Area: 154.08(H) x86.58(V) 7inPower Consumption: Standby 0.5WCall Delay: 120s10%Monitoring Delay: 60s10%Working Temperature: -20-+60BUS Power Supply Parameters:Input Voltage: AC 100-240VOutput Voltage: DC24V 2.5A.Package List:1 x Outdoor Camera 3 x Monitor1 x Bus Power 1 x 2p Terminal Line8 x Screw8 x Expansion Tube3 x Monitor Bracket3 x Monitor Hanging Board1 x 4P Terminal1 x 3P Terminal3 x 2P Terminal1 x Manual 13 x Lock Screw2 x Lock Piece3 x Key1 x Cylinder1 x Lock Body1 x Lock Shell1 x SwitchNote:1. The machine should be placed in a sturdy, well‑ventilated, dry, and free place. Avoid direct sunlight, no strong magnetic field and dust.2. Do not use chemicals to clean the surface; it can be cleaned with a soft dry cloth.3.Avoid pressing multiple keys at the same time.4. The outdoor unit and indoor unit must be used in conjunction with the designated model, and must not be mixed with other models or products of other companies.