Aposonic H.264 CCTV 4-Channel 1080P TVI/CVI/AHD/960H 4-in-1 Surveillance Standalone DVR, HDMI/VGA Dual Output, Mobile Access, Mac Ready (No HDD) Auto detection of HD-TVI, AHD, CVI, and 960H analog video signals up to 2MP. Recording / Playback Quality: 1080P : 18 fps, 720P / WD1 : 25 fps (PAL) / 30 fps (NTSC). 4CH simultaneously playback. 1 x HDD bay, support up to 8TB. 4 x Audio-in / 1 x out. 1 x RS485 port. USB 2.0  2 DVR Motion detection triggered events can be promptly notified by loud audible alert and / or Email notifications to PCs or smart phones. Live view and access control through CMS. Streaming live video / playback on mobile smart phones or tablets via free app.