Each camera needs to be plugged into a nearby outlet for power. This item comes with NO Hard Drive. The item “ZOSI 4CH 1080p NVR 960p HD Outdoor Wireless Home Security IP Camera System Wifi” is in sale since Tuesday, March 22, 2016. This item is in the category “Consumer Electronics\Surveillance & Smart Home Electronics\Home Surveillance\IP & Smart Security Camera Systems”. The seller is “zosi_cctv” and is located in Walton, Kentucky. This item can be shipped to United States.