All these are wired system, not wireless. Complete system do not need Internet to work. However, an Internet will be necessary if you wish to use mobile for remote view. Option 1: 8 Channel DVR, 4 Camera, NO. 4 x 720P Black Bullet Camera. 4 x 60FT CCTV cable for camera. 2 x 12V/2A power supply. 1 x 1 to 4 power splitter cable. Option 2: 8 Channel DVR, 4 Camera. 1TB Hard Drive Pre-installed in DVR box. 8 Channel DVR, 8 Camera, NO. 8 x 720P Black Bullet Camera. 8 x 60FT CCTV cable for camera. 3 x 12V/2A power supply. 2 x 1 to 4 power splitter cable. 8 Channel DVR, 8 Camera. The item "ZOSI 1080P HDMI 8CH DVR HD 720P Day Night Vision CCTV Security Camera System 1TB" is in sale since Monday, December 18, 2017. 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 Rowland Heights, California. This item can be shipped to United States.