Main Functions 1. One door station can support four hundred indoor phones at most. 2. With infrared LED inside, which can help you easily identify visitor at night time. 3. Network application optional. 4. When in network system, the door station can have a dual communication with the management unit. 5. Remote unlocking and three kinds of chord melody rings optional. 6. Please see the pictures for those indoor phones shown on the right (Character: Indoor phone). Main Functions 1. Two door station can support up to four indoor phones 2. Handsfree indoor phone, remote door unlocking 3. LED in door station provides clear picture even in nighttime. 4. It is a pin hole door station, surface-mounted design. Color 5' TFT Screen. 5. 30 seconds ring tones are available, 30 seconds active surveillance, 120 seconds private conversation. 6. Double Ding-Dong ring. Name label changeable Front Door Intercom. Avalable is gold. Camera can either be Surface Mounted or Flush Mounted. Surface mounted Front Door Intercom. Extra 5" Monitor Door Station Switcher for Second Door