01. 4 wires connection;
02. DIY system Plug-and-play connection;
03. Up to 4 door stations and 4 indoor phones;
04. Intercom between indoor phones;
05. Calling transfer between indoor phones;
06. Both door station and indoor phone have outputs for e-lock;
07. Anti-vandal, waterproof and cast aluminum;
08. Surface mount and flush mount are optional;
09. Night viewing with white LED;
10. Various hands free indoor phones are optional;
11. Pin-hole door camera is optional;
12. Audio baby monitor;
13. Card reader is optional;
14. Touch button indoor phone is optional;
15. Camera: 1/3-inch CCD (color), CMOS (B/W);
16. Viewing angle: 92°;
17. Lens: F=3.6;
18. Resolution: 420TVL;
19. Minimum illumination: 0.01 lux;
20. Video output: 1Vp-p/75Ω;
21. Audio SNR: ≥25dB;
22. Audio distortion: ≤7%;
23. Standby current: ≤60mA;
24. Working current: ≤230mA;
25. Working voltage: 18V DC ± 10%;
26. Environment temperature: -40 to 70°C.