4XEM 4X-IP7131. Maximum resolution: 640 x 480 pixels, Video formats supported: MPEG-4, Frame rate: 30 fps. Minimum illumination: 1.5 lx, Camera shutter speed: 1/60 - 1/15000 s. Sensor type: CMOS, Optical sensor size: 1/0.157 mm (1/4 "). Built-in processor: VVTK-1000 SoC. Flash memory: 4 MB, Internal memory: 32 MB