Features:
1) Functions:
    a) Door bell
    b) Door phone
    c) Video observance
    d) Optional functions:
        i) Image recording: automatically store up to 64 frames of visitors' images
        ii) Home alarm security
        iii) Visitor' image record message recording: automatically record up to
            3 minute of massages if the host is not available to answer the phone
2) Indoor monitor: 
   a) Case: plastic 
    b) Bell ring: dingdong or other options
    c) Display: CRT 380 TV lines (TFT LCD 480 x 240)
    d) Max. monitor number: 4
   e) Inter talk: hand set
    f) Wire sensors: NA
   g) Wireless sensor: optional 1 – 4
   h) Phone alarm: NA
3) Outdoor camera: 
    a) Case: plastic
    b) Camera: 1/3" CMOS B/W (1/3" Color CMOS), CCD optional
    c) Infrared: built-in
    d) Access control: NA
    e) Network: NA
    f) Water proof: Yes
4) System:
    a) Video format: PAL or NTSC
    b) Power: 15V, 15W
    c) Lock connection: Yes
    d) Cable: 10 - 15 meter optional