VIVOTEK IP3122. Maximum resolution: 0 pixels, Video formats supported: MPEG-4, Analog signal format system: PAL. Sensor type: CCD, Optical sensor size: 1/0.157 mm (1/4 "). Certification: CE, FCC . Power requirements: 12V DC, 24V AC, Dimensions (WxDxH): 88.9 x 153 x 57.2 mm, Compatible operating systems: Microsoft Windows 2000/XP/Vista/7