• 7" Color TFT-LCD Display, Digital Panel Touch Key• 4 Wires System, Easy Installation• Support Picture Memory• Hands free, Visitor Calling, Video Intercom, Unlock, Monitor• Two Outdoor Station, up to 4 Indoor Monitors• Calling between Extensions Unit• Nano glass shield camera with aluminium alloy panel• 1/3" CMOS HD Camera• IR Color Camera, Night Vision• Weather/Vandal-Proof Outdoor unit