Dahua Intercom Home System Video Door Bell Phone -(Night Vision)

This video door phone use international 4-wire structure design. The Max distance of audio & video transmission is 100 meters. Provides a 120 degree wide viewing angle, equip with a rainproof cover, can be installed outdoor. Built in IR light, you can monitor the outdoor scene at any time. It is an ideal home security product which will make for a safer home environment! 
Product Features
Built-in 5 IR Lights for night visionDual-way intercomIP54 and rainproof coverPower from indoor monitorAluminum alloy panel4-Wire Connection
1 Camera can work with max 6 indoor monitors
Product Details 
1. Using 4-core cable to connect camera to monitor, using 5-core cable to connect monitor to next monitor. The Max distance support 100 meter. Different distance, use different diameter cable.
The cable need to buy by yourself, we will not provide it.) 
2.  IR Night Vision. The outdoor camera build-in 5 infrared LED light.With this function, you can see outside no matter day or night. Keep your home more safer.
3. Support Two-way radio function
When a visitor ring the bell, the monitor will be activated and show the image outside. Press the answer button, then you can talk to outside, press the answer button again to turn it off. 
4.Waterproof and dust proof
The outdoor camera equip with a weatherproof cover, can be used outside even in very bad weather. 
5. Can work with DC12V electric lock. Open the door with the unlock button of indoor monitor.

Door Station/Video Parameters

Camera1/4" CMOS

Resolution720 × 576

Video Frame RatePAL: 25 fps

Door Station/Audio Parameters

Audio InputBuilt-in Omnidirectional Microphone

Audio OutputBuilt-in Loudspeaker

Audio QualityNoise Suppression and Echo Cancellation

Door Station/Light Supplement

Light Supplement ModePhotosensitive IR Supplement, IR Range: 2 Meters

Door Station/Device Interfaces

Four-Wire Interface1 Four-Wire Interface (1-ch Video Input, 1-ch Audio Input/Output, 1-ch Power Supply, 1-ch Grounding)

IO Output1 Relay Output

Door Station/General

MaterialAluminum Alloy

Power ConsumptionMax. 3W

Working Temperature-30° C to +60° C (-22° F to 140° F)

Working Humidity10% to 90%

Dimension (L X W X H)128 mm × 42 mm × 24.8 mm (5.0" × 1.7" × 0.9")

Indoor Station/Display Parameters

Display Screen7-Inch Colorful TFT LCD

Display Resolution800 × 480

Operation MethodPhysical Button

Indoor Station/Audio Parameters

Audio InputBuilt-in Omnidirectional Microphone

Audio OutputBuilt-in Loudspeaker

Audio QualityNoise Suppression and Echo Cancellation