Hikvision Turbo HD is a revolutionary technology that allows users to send uncompressed, high-resolution video over coaxial cable. The Turbo HD product family is comprised of full HD cameras and DVRs that offer seamless compatibility with multiple video formats, from standard definition analogue to HD-TVI to megapixel IP. Other benefits of HD-TVI include absence of video delay in live viewing, bi-directional signaling, and highly efficient storage, adding up to an incredible breakthrough in the evolution of analogue transmission. Features: H.264 & Dual-stream video compression Support both HD-TVI and analog cameras with adaptive access Full channel@1080P resolution real-time recording HDMI and VGA output at up to 1920×1080P resolution Long transmission distance over coax cable Support up to 16-ch synchronous playback at 1080P resolution Specifications: Video/Audio Input Video Compression:  H.264 Analog and HD-TVI Video Input:  4-ch, BNC interface (1.0Vp-p, 75 Ω) Audio Compression:  G.711u Audio Input:  4-ch Audio Input Interface:  RCA (2.0 Vp-p, 1 kΩ) Two-way Audio:  1-ch (Audio In) Video/Audio Output VGA Output:  1-ch, resolution: 1920×1080P/60Hz,1280×1024/60Hz,1280×720/60Hz, 1024×768/60Hz CVBS Output:  PAL: 704×576, NTSC: 704×480 HDMI Output:  1920 × 1080 / 60 Hz,1280 × 1024 / 60 Hz, 1280 × 720 / 60 Hz, 1024 × 768 / 60 Hz Recording resolution:  Main stream: 1080P / 720P / VGA / WD1 / 4CIF / CIF;Sub-stream: WD1(non-real-time) / 4CIF(non-real-time) / CIF / QCIF / QVGA Frame Rate:  1/16 fps ~ Real time frame rate Video Bit Rate:  32 Kbps-10 Mbps Stream Type:  Video/Video&Audio Audio Output:  2-ch RCA(Linear, 1kΩ) Audio Bit Rate:  64kbps Dual Stream:  Support Playback Resolution:  1080P / 720P / VGA / WD1 / 4CIF / CIF / QVGA / QCIF Synchronous Playback:  16-ch Hard Disk Driver Interface Type:  4 SATA Interfaces Capacity:  Up to 4TB capacity for each disk e-SATA Interface:  1 eSATA interface External Interface Network Interface:  1 RJ45 10M/100M/1000M adaptive Ethernet Interface USB Interface:  3 USB2.0 interfaces Serial Interface:  1RS-485 interface, 1 RS-232 interface, 1 RS-485 keyboard interface Alarm Input:  16-ch Alarm Output:  4-ch General Power Supply:  100 ~ 240VAC, 47 ~ 63HZ Consumption:  ≤ 55W Working Temperature:  -10 °C ~ +55 °C (14 °F ~ 131 °F) Working Humidity:  10% ~ 90% Chassis:  19-inch rack-mounted 1.5U chassis Dimensions:  445 × 390 × 70 mm (17.5 × 15.3 × 2.7 inch) Weight:  ≤5Kg (11.0lb)