Amazon Price: $328.88 $218.88 You save: $110.00 (33%). (as of May 30, 2017 12:20 am – Details). Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on the Amazon site at the time of purchase will apply to the purchase of this product.

This System includes 1 outdoor color camera with 3 pcs of 7 inch color LCD screen,Support 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? an friend? or a burglar? Then you can press the"intercom" button on monitor to talk with the people outside, unlock the lock and press the "intercom" button again to end the conversion.
This 2-way communication is an inexpensive and effective way to talk with the stranger at the door without actually opening the door.

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 displays).
Resolution: 800 X 480.
Input: AC 100-240V 50Hz-60Hz.
Output: DC 15V/1500 mA.
Case: Plastic Material.
Mounting: Surface Mount.

Outdoor Camera:
Camera: 1/3 CMOS.
Camera resolution : 700 line.
Illumination: 0 Lux.
Night vision illumination distance:1 meter.
Power Adapter: Shared indoor unit.
Viewing angle: 92 degrees.
Case: Aluminum.
Installation: Surface Mounting.
Dimensions: 3.1 x 7.1 x 1.9 inch.
Weight: 0.48 pounds.

Packing includes:
1 x Outdoor Camera.
3 x Indoor Monitor.
3 x Hanging plate.
3 x Power Adapter.
3 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.