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?One door station can support up to four indoor phones.If needed,it is accepted to connect with two door station through switch; ?Hands-free indoor phone, remote door unlocking. ?LED in the door station provides a clear picture even at nighttime. ?Surface-mounted door station. Color 4'TFT and B/W display are optional. ?30 seconds ring tones are available,30 seconds surveillance, 120 seconds intercom. ?Double Ding-Dong ring and chord are opional, pin hole door station. ?Heavy duty anti-vandal and water-proof door station. Description Specification Working voltage DC 12V±10 Static current ≤12mA Working current ≤180mA Camera Lens 1/3? CCD/CMOS Viewing angel 92.8° Min.Illuminance =0.1 Lux Lens F F=3.6 Dimension 126x92x98 mm
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