http://www.ec21.com/ec-market/b/w intercom video door phone.html http://allenlao.en.ec21.com/Video_Door_Phones_B_W--3973935_3977387.html Video Door Phones B/W Wired SAV-N3-4W Function: >> Visitor calling, freehand, video intercom, unlock, moni20091217 http://seeboy.en.ec21.com/Black_and_White_Video_Door--3096398_3096441.html B/W 4inch CRT FLAT screen. visitor calling, video intercom, unlock, monitor. night vision With LED li20091124 http://opiz.en.ec21.com/Video_Door_Phone--3367028_3538752.html Video door phone (color or B/W optional) Call,intercom with the outdoor station and administrator center,monitor outsi20090805 http://finetel.en.ec21.com/Video_Door_Phone_WS_140--532159_3680186.htmlB/W SUPPLEMENTARY MONITORS AVAILABLE UP TO 3 AND 1 CAMERA INPUT, INTERCOM Video Door Phone s20090718 http://henrynktj.en.ec21.com/4_Inch_Video_Door_Phone--2838042_2838051.html 4" B/W VIDEO DOOR PHONE HAND FREE INTERCOM MONITOR UNLOCK FUNCTIONS WITH NIGHT VISION 20090427 http://sekosecurity.en.ec21.com/Handset_B_W_Video_Intercom--2716600_2823549.htmlintercom, lock opening and alarm functions. 4. Max 3 interphones can be connect to one outdoor camera. 5. The system 20090423 http://sifangtongda.en.ec21.com/Video_Door_Phone--3145593_3145594.htmlDoor stations are with 1/3" CCD camera or CMOS camera,night vision. 5.4-inch TFT LCD, handfree design. 6.Color or B/W v20090210 http://wwsent.en.ec21.com/Villa_Video_Door_Phone--2628200_2628204.htmlIntercom System Specification: Materials: 1) Indoor Phone: ABS 2) Outdoor Unit: Aluminum Alloy CCD Camera, 4inch B/W Di20080226 http://hengjicn.en.ec21.com/Wireless_Video_Door_Phone--755584_827775.html4?B/W WIRELESS VIDEO DOOR PHONE (CMOS/CCD) 4?TFT/LCD TRANSMIT FREQUENCY: 2.4GHZ TRANSMIT POWER: 10-50MW TRANSMIT DISTAN20060729 http://mcbmccb.en.ec21.com/Wireless_Video_Door_Phone--760951_760960.html4?B/W WIRELESS VIDEO DOOR PHONE (CMOS/CCD) 4?TFT TRANSMIT FREQUENCY: 2.4GHZ TRANSMIT POWER: 10-50MW TRANSMIT DISTANCE:M20060729 http://calo886.en.ec21.com/Video_Doorphone--1610416_1874082.htmlBasic Parameter: Display screen: 4 inch B/W flat CRT or TFT color Resolution: ≥500TV lines Video signal: 75V 1Vp-20070417 http://raulcusam.en.ec21.com/Video_Door_Phone_CS_300SV--2245115_2245180.htmldoor station can up to four indoor phone surveillance intercom remote unlocking B/W or color are available LED in the d20070910