7" Color TFT-LCD Display4 Wires System, Easy InstallationHands free, Visitor Calling, Video Intercom, Unlock, MonitorTwo Outdoor Station, up to 4 Indoor MonitorsCalling between Extensions UnitNano glass shield camera with aluminium alloy panel 1/3" CMOS HD CameraIR Color Camera, Night VisionWeather/Vandal-Proof Outdoor unit..

Suitable For Wooden Door, Glass Door, Metal Door,Fireproof DoorAnti-Residual Magnetism DesignedHigh Strength Material, Anodized Aluminum Housing..