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Description:Product Name: Surveillance EquipmentModel Number: SD-680R4 + SD-690D5Place of Origin: ChinaSD-690D5 specifications: 1) Camera: CMOS 2) Wide angle: 78o 3) Total pixel no.: 537 x 505 (V x H), 270000 pixels 4) Scan frequency: 15.625kHz, 50Hz 5) Horizontal resolution:>420 TV lines 6) Min. illumination: 0.51Lux 7) Video output: 1.0Vp-p / 75 Ohm 8) Auto electronic shutter: 1/60 - 1/100,00 9) Launching frequency: 2.4GHz (4ch) 10) Signal modulation: FM 11) Frequency output: 90dBu / V, 3M 12) Antenna: gain-oriented antenna 13) Operation temp.: -20 ~ 90o 14) Power: DC 12C, 500mA AC adaptor 15) Weight: 300g SD-680R4 specifications: 1) Screen size: 14" 2) 4SC: ch1, ch2, ch3, auto 3) 4Q: Quad, full (CH1, CH2, CH3, CH4), PIP, zoom, auto 4) Resolution: 380 lines 5) Switching time: 0 - 59secs 6) Metal back cabinet 7) LED indicator 8) VCR hookup for recording 9) VCR playback function 10) Built-in timer 11) Picture freeze function 12) Power supply: 17V DC 13) Molded recessed carrying handle 14) Scanning system: EIA / CCIR 15) Optional: 2-way talking