Main funcitons:

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