TianGang Electrical International Limited founded in 2002, as a manufactory, we own professional system of design, research, manufacture and distribution, in order to commit ourselves to provide the best service and super quality of security, audio / video for our customers.Our products are suitable for different markets.Under the tenet of sincere service and mutual development, TianGang Electrical International Limited ensures the benefits of all the distributors and final users.VIDEO DOOR PHONEBASIC FUNCTION1.Monitor+Intercom call+Talk+Unlock2. One door station can support up to four indoor phones.If needed,it can be extended to two door stations supporting up to four indoor phones. 3. B/W and Color TFT screen,4"size is available4.Camera:1/3 B/W CCD or color CCD(CMOS camera is also available)5.Double ding dong ring or chord are optional 6.MInimum illumination:0.1LUX(infra-red at night time)7.Outdoor station is waterproof8.Power supply:adapter or transformer9.5 wires or 2 wires
