MODEL ZB-6602 Signal SYSTEM PAL Image Sensor 1/4"CCD Horiontal resolution 420TVL View Angle 120 Built-in lens 3.7 mm pin hole lens S/N Ratio More than 48 dB Power supply DC 5V Consumption Current 250Ma~550Ma Bulit-in Battery 4.2V, 2200mAh Recharged ...