01. Large wide screen: 7 inches;
02. Door station with pinhole camera;
03. More than 10 melodies for ring selection;
04. To sure the image clearly at night by IR night vision;
05. 4-wire system, easy to install and operating;
06. Accepted to be connected with 4 indoor phones at most to different floor each user;
07. Accepted to be connected with 4 door stations at most to several entrances each user;
08. All indoor phones are accepted to call, transfer calling and communicate each other;
09. Door station can be installed by surface mount;
10. Camera: 1/3 inches CCD (color), CMOS (B/W);
11. Minimum illumination: 0.01 Lux;
12. Video output: 1Vp-p/75Ω;
13. Working voltage: 18V DC ± 10%;
14. Working current: ≤500mA;
15. Environment temperature: -40 to 70°;
16. Display: 4 CRT/3.5, 4, 5, 5.8 and 7 inches TFT-LCD;
17. Resolution: 480 x 234 (3.5 inches)/960 x 234 (4, 5, 5.8 inches)/1,440 x 234 (7 inches) pixels;
18. Working voltage: 18V DC ± 10%;
19. Working current: ≤500mA;
20. Environment temperature: -10 to 55°;
21. Input voltage: 100 to 240V AC;
22. Output voltage: 18V DC;
23. Output current: 1A;
24. Power plug style: optional.