This System includes 1 outdoor color camera with 2 call buttons,7 inch color LCD screen 2 PCS,Support IR night vision.

When someone press the call button on outdoor unit, it will active the indoor monitor, monitor will turn on, ring and show the video outside. So you can see who is outside, a postman? a neighbor? a salesman? or a burglar? Then you can press the response button on monitor to talk with the people outside, unlock the lock and press the response button again to end the conversion.

Feature:
The TFT 7 inch digital color LCD screen for monitoring.
High-resolution night vision, monitoring, calling, speaking, unlocking, remote controlling.
Hand-free intercom communication.
Brightness, Chroma, and Volume adjustable.
16-chord melody ring for option.

Indoor Monitor:
Display: 7 inch TFT LCD screen (16:9 display).
Resolution: 800 X 480.
Input: AC 100-240V 50 Hz-60 Hz.
Output: DC 15V/1500 mA.
Case: ABS Engineering Plastics.
Installation:Surface mounting.
Dimension:9.4 x 5.9 x 1.0 inch.
Weight:1.0 pounds

Outdoor camera:
Camera resolution: 700 Lines.
Camera: 1/3 Color CMOS Camera.
Built-in microphone and speaker
Power Adapter: From Monitor, DC15 V.
Viewing angle: (U/D/L/R, degree): 60/35/70/70.
Connection: 4 core/5 core wire (max support 12 monitors).
Case: Aluminum material, weatherproof.
Dimension:4.8 x 10.8 x 1.7 inch.
Weight:1.8 pounds.

Packing includes:
1 x Outdoor Camera.
2 x Indoor Monitor.
2 x Hanging plate.
2 x Power Adapters.
2 x 4-core/5-core connection cable.
1 x 2-core connection cable.
1 x bags Screws.
1 x Manual.

Note:Electric bolt lock, Electric strike,Electric magnetic lock,need extra "Power Supply Control" connecting the lock.
Please search ASIN: "B01MFF4X9R" for Dedicated Power Supply Control.