Zmodo 16 Channel All D1 High Profile HDMI SDVR(Super Digital Video Recorder) Security Surveillance DVR With 2TB Hard Drive 16 Channel H.264 High Profile Full D1 SDVR Security Camera System with 8 Sony CCD Indoor/Outdoor Surveillance Cameras & 2TB Hard Drive Not Baseline, Not Main Profile, Its H.264 High Profile: The High Profile is the most powerful profile in H.264, and it allows most efficient coding of video. 16CH Alarm Inputs & 2CH Alarm Outputs: With alarm inputs and outputs, you are able to complete the whole surveillance system with external alarm devices or systems, which enable you to enjoy the convenience of advanced security. Dual Stream to Customize Video Frame Rate: Enable sub code can customize the frame rate and bit rate for remote view and mobile streaming in case of limited upload bandwidth Mass Storage with 4x SATA Interface, Supports up to 8TB: Storage capacity will never be a problem with the SDVR. Up to 4 SATA hard disk drives can be installed and each supports up to 2048G, thats total up to 8T.