ZOSI 16 channels 720P HD-TVI Digital Video Recorder provides a complete security solution for your home and office network. Coming with H. 264 video compression technology. This DVR can remotely access from both internet or from your 3G/4G smart phones. This is 16channel 4-in-1 DVR which supports Analog, HD-TVI, CVI, AHD Camera. Which can connect up to 16PCS 720P/1080P HD cameras OR Analog camera. Features: 1. Super Video Quality and Clarity: Supports 16-Channel 720P Resolution 2. Multiple Trigger/Alarm Events: Recording, PTZ, Tour, Video Push, Email, FTP, and Buzzer 3. Custom Record Modes (e.g. Manual, Scheduled, Motion Detection) and Record Intervals (1-120min) 4. USB Backup. you can transfer video files to back-up media via USB port. 5. View Your Home on Your Phone anytime anywhere. Specification: Operating System: Embedded LINUX System Resources: Pentaplex function: live, recording, playback, backup & remote access Display: 1/4/8/9/16 Encode capacity: 16x 720P@30fps Decode capacity: 4x 720P@30fps Trigger Event, Recording, PTZ, Tour, Alarm, Video Push, Email, FTP, Spot, Buzzer &Screen Tips Recording Mode: Manual>Alarm>Video Detection>Continuous Search Mode: Time/Date ,Alarm, Motion Detection & exact search Video Outputs: 1CH HDMI +1CH VGA + 1CH CVBS Video Inputs: 16CH Audio Inputs/Outputs: 2CH/1CH Alarm Inputs/Outputs: 2CH/1CH Net Interface: RJ-45 PTZ Control: Support Hard Disk: 1 SATA ports(Max 6TB) Package Contents 1 x 16CH 720P Digital Video Recorder 1 x 12V/2000mA Power Supply for DVR 1 x Mouse for DVR 1 x User guide for DVR please noted This system did not come with hard drive. Assembling a 3.5inch SATA 500GB to 2TB hard drive is necessary.