DS-2 C C 1 2 A 2 P - IT3 C: H series(project) E: E series(economic) S: S series(special) Hikvision front-end products Color 1: Box/bullet 5: Dome/mini 8: 600TVL A: 700TVL C: 720P D: 1080P F: 3MP P: PAL system N: NTSC system S: HD-SDI T: HD-TVI IT: EXIR PH: Pinhole camera P: Plastic housing S: Audio H: heater VF: vari-focal VP: vandal proof IR/IR3: 20/40m IR Distance IT1/3/5: 20/40/80m EXIR Distance A: AC24V/DC12V C: AC100V-240V Z: Motorized lens (Turbo HD Camera) 1: OSD(2D DNR) 3: OSD(3D DNR) 5: OSD, super low illumination 7: OSD, WDR 9: OSD, WDR & HLC H series default: 1st generation 1: 2nd generation 2: 3rd generation E series 5: 1st generation 6: 2nd generation S series 4: Mini 8: Mobile Analog Camera MODEL NAME CODING RULE Hikvision product 71/72/73/81 series Number of channels H.264 encoding G: HD720P real-time H: HD1080P real-time HD video input SATA interface HDMI output DS - 7 2 1 6 H G H I - S H DVR