Length: optional. 2th generation can be used as a webcam external USB2.0 interface chip design plug and play suitable for notebook and desktop computers. 300KP camera pixels 1/6 'CMOS sensor 640 x480 resolution. Provide dynamic AVI format recording the highest 30 frames per second (Mac OS) to other software. Focal length: 8 cm to infinity lens Angle: 67 degree. Level of waterproof design: IP67. With 4-LED adjustable brightness. Automatic white balance automatic exposure provides affect the brightness contrast hue chroma adjustment. The y-cable double street power supply design does not need to connect the power supply transformer. Using high quality double shielded wire signal attenuation the outer electromagnetic interference waterproof effect is best. Current market can only rain-proof but our factory can water-proof. Test under the -10??20??50??80? environment it can continue work 156 hours.