Q-See QT5716-8V3-2 16-Channel DVR 960H Security Surveillance System, 8 Hi-Resolution ***900***TVL Cameras, 2TB Hard Drive (Black) 16 Channel DVR | Large 960H Resolution | 8 High Resolution 900+TVL Cameras Model QT5716-8V3-2: experience superb quality and clarity Real-Time DVR with pre-installed 2 TB A/V Rated Hard Drive (QT5716): Save up to 2 TB of video or expand to up to 3TB Remote Monitoring Via Free Q-See Apps: Gain peace of mind from anywhere using an iPhone, iPad, Android, or Windows Phone Start-Up Wizard: Ensures quick and simple setup of remote monitoring features, PC & Mac Compatible: Flexibility to use systems with either PC or Mac computer, Scan N' View Connectivity: Easily connect to the DVR for instant live viewing on a smartphone or tablet, Cable Versatility: Two cable lengths, 60ft & 100ft, included for added installation flexibility, Power AC 110-240V, DC12V 2A