Defender PhoenixM2 Wireless Security System with 7`Monitor and Two Night Vision Cameras Superior digital wireless functionality ensures that signals passing between the camera and handheld screen remain clear up to 450ft away- Please note: the cameras must be plugged into a power source The included 8GB SD card can capture up to 350 minutes of audio/video motion footage (expandable up to 128GB SD card) Each camera is equipped with night vision that lets you see up to 40ft away in total darkness This system supports a total of 4 cameras to monitor multiple areas on your property and Flexible recording options allow for a continuous, scheduled or motion detected video feed Camera Power Input 9V DC 600mA and Power Adapter Input AC 100-240V ~ 50/60Hz