Superior digital wireless functionality ensures that signals passing between the camera and handheld screen remain clear up to 450ft away. The IR cut filter provides you with advanced color accuracy. Please note: the cameras must be plugged in to a power source. Feel protected 24 hours a day. Each camera is equipped with night vision that lets you see up to 40ft away in total darkness! The PHOENIXM2 system supports a total of 4 cameras to monitor multiple areas on your property.