The CA-201 is a worlds smallest yet most powerful wireless camera of its kind. New high power 1.2 GHz teacnology provides 300ft range of transmition with solid stability and will not be interfered by crowded 2.4GHz signals. Great for portable video surveillance or for hobbies. The camera and the built-in transmitter only uses about 150mA of power and operates for up to 8 hours on 9 V battery.