Use 1/3" Sony Colour CCD and HQ1 Max. perform 550 TV lines With Sunshield DC12V Models: YP-255PS : 1/3" Sony CCD / 550 TV lines / 0.8 lux / DC12V input YP-255PSR: 1/3" Sony CCD / 550 TV lines / 0.8 lux (Day, Colour), 0.05 lux (Night, B/W) / DC12V YP-2554PS : 1/3" Sony CCD / 550 TV lines / 0.8 lux / DC12V-AC24V input YP-2554PSR : 1/3" Sony CCD / 550 TV lines / 0.8 lux (Day, Colour), 0.05 lux (Night, B/W) / DC12V-AC24V input