This Dahua all in one 4 channel tribrid DVR HCVR7104H-4M accepts three different types of cameras including IP, CVI, and Analog. With this many choices, you will be covered no matter what camera you may have. With its easy BNC style connections, connecting and setting up your DVR is a breeze. Stream full HD video over coaxial without having to change your existing wires out. ATT: This is a genuine OEM Dahua DVR. Beware of the cheaper Chinese units out on the market which the firmware can?t be upgraded. With our company, you get a 5 year warranty, free US tech support, Fast free shipping, and US stocked product, something our Chinese competitors can?t compete with. Features: Embedded processor Max 4/8/16 HDCVI/CVBS Inputs Max 6/12/24 channels IP camera inputs Max 24/48/96Mbps Incoming Bandwidth Up to5M Resolution for Preview and Playback 1HDD, Up to 6TB Smart Search and Intelligent Video System(Optional) Technical Specification: System Main Processor Embedded Processor Operating System Embedded LINUX Display Interface 1 HDMI(up to 3840x2160),1 VGA Resolution 3840x2160,19201080, 12801024, 1280720, 1024768 Multi-screen Display 4CH: 1/4/6 OSD Camera title, Time, Video loss, Camera lock, Motion detection, Recording Video Detection and Alarm Trigger Events Recording, PTZ, Tour, Video Push, Email, FTP, Snapshot, Buzzer and Screen Tips Video Detection Motion Detection, MD Zones: 396 (22 18), Video Loss,Tampering and Diagnosis Alarm input N/A Relay Output N/A Playback and Backup Playback 4CH: 1/4 Search Mode Time /Date, Alarm, MD and Exact Search (accurate to second) Playback Function Play, Pause, Stop, Rewind, Fast play, Slow Play, Next File, Previous File, Next Camera, Previous Camera, Full Screen, Repeat, Shuffle, Backup Selection, Digital Zoom Backup Mode USB Device/Network Storage Internal HDD 1 SATA Port, up to 8TB capacity eSATA N/A Auxiliary Interface USB 2 USB Ports (1 USB 2.0 , 1 USB 3.0) RS232 N/A RS485 1 Port, for PTZ Control Audio and Video HDCVI Camera Input 4 Channel IP Camera Input 4+2 Channel, each channel up to 8MP Audio In/Out 1/1, RCA Two-way Talk Reuse audio in/out, RCA Recording Compression H.264+/H.264 Resolution 4K, 4MP, 1080P, 720P, 960H, D1, HD1, BCIF, CIF, QCIF Record Rate Main stream: 1st channel 4K(1~12/15fps)/ 4MP(1~15fps), others 4MP(1~15fps); 1080P/720P/960H/D1/HD1/BCIF/CIF/QCIF (1~25/30fps) Sub steram:D1/CIF/QCIF(1~25/30fps) Bit Rate 1Kbps ~ 12288Kbps Per Channel Record Mode Manual, Schedule (Regular, Continuous), MD (Video detection: Motion Detection, Video Loss, Tampering), Alarm, Stop Record Interval 1 ~ 60 min (default: 60 min), Pre-record: 1 ~ 30 sec, Post-record: 10 ~ 300 sec Network Interface 1 RJ-45 Port (1000M) Network Function HTTP, TCP/IP, IPv4/IPv6, UPnP, RTSP, UDP, SMTP, NTP, DHCP, DNS, IP Filter, PPPoE,DDNS, FTP, Alarm Server, P2P,IP Search (Support Dahua IP camera, DVR, NVS, etc.) Max. User Access 128 users Smart Phone iPhone, iPad, Android Interoperability ONVIF 2.42, CGI Conformant Electrical Power Supply 4CH: DC12V/2A, Power Consumption 15W (Without HDD) Environmental Operating Conditions -10C ~ +55C (+14F ~ +131F), 0~ 90% RH Storage Conditions -20C ~ +70C (-4F ~ +158F) , 0~ 90% RH Construction Dimensions Mini 1U, 325mm255mm55mm (12.8" x 10" x 2.2") Net Weight 1.5kg (3.3 lb) (without HDD) Gross Weight 2kg (4.4lb) Installation Desktop installation Disclaimer: Dahua is the 2nd largest OEM manufacturer in the world. Most of Dahua product sold in the US are the non-branded OEM versions. The non-branded product is the exact same item, but the Dahua logo is removed and they use a different OEM part # on the sticker. We are able to get non-branded versions at lower costs and therefore offer our customers lower prices. The product that you order is manufactured by Dahua and carries their 5 year warranty.