Aposonic 4-Channel H.264 AHD 720P / 960H Hybrid DVR with 4 x Outdoor 1.3MP 720P IR Cameras Surveillance HD System with 1TB HDD, Mobile Access, Mac Ready AHD 720P/960H/D1/Half D1/CIF Full Real-Time Recording / Playback Quality. Recording 1280x720 on AHD cameras or 960x480 / 720x480 / 720x240 / 360x240 on your existing analog ones at 30 FPS per channel. Including 4 of AHD 1.3MP 720P fixed-lens 3.6mm cameras. 1TB HDD pre-installed. Motion detection triggered events can be promptly notified by loud audible alert and / or by Email to your PC or mobile devices. Dual streaming technology to encode recording stream and network stream separately. Support NAT function, QR code scanning by mobile devices. Support live view and remote configuration via all web browsers on Mac and PC. Streaming live video / playback on mobile smart phones or tablets via free app.