Swann PRO-555. Maximum resolution: 628 x 582 pixels, Analog signal format system: PAL, NTSC. Minimum illumination: 0 lx, Viewing angle, horizontal: 41 °, Viewing angle, vertical: 41 °. Sensor type: CCD, Optical sensor size: 1/0.157 mm (1/4 "). Focal length range (f-f): 0 - 6 mm. Signal-to-Noise Ratio (SNR): 50 dB