Swann 4 Channel 960H DVR Home Security System with 4 Bullet Cameras - Contains 1 x DVR4-1525, 500GB HDD/ 4 x Pro 615 Cameras - SWDVK-4ALP14-US Includes 4 all-weather, high resolution 650TVL cameras with powerful night vision to 66ft/20m. Set & forget by recording continuously from 4 cameras for 30 days+ onto a massive 500GB hard drive with motion detection. Save time & have peace of mind by easily locating incident video, then transfer to USB flash drive Connect to the internet in seconds with the latest SwannLink encrypted 'Peer-to-Peer' technology - just scan the DVR's unique QR Code Surveillance in the palm of your hand with live viewing on 3G/4G-enabled Smartphone & tablets including, iPhone, iPad, Android devices and more* using the free SwannView Plus app