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 HD-TVI/analog/IP camera triple hybrid 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 8-ch synchronous playback hikvision, ds-2cc51d3svpi, dome camera, 2mp, hd-sdi vandal, dwdr, ip66, ir, 3.6mm lens 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 HDMI Output:  1920 × 1080 / 60 Hz,1280 × 1024 / 60 Hz, 1280 × 720 / 60 Hz, 1024 × 768 / 60 Hz Frame Rate:  Main stream: 1/16 fps ~ Real time frame rateSub-stream: 1/16 fps ~ Real time frame rate Stream Type:  Video/Video&Audio Audio Output:  1-ch RCA(Linear, 1kΩ) Audio Bit Rate:  64kbps Dual Stream:  Support Playback Resolution:  1080P / 720P / VGA / WD1 / 4CIF / CIF / QVGA / QCIF Synchronous Playback:  4-ch   Hard Disk Driver Interface Type:  1 SATA Interface Capacity:  Up to 4TB capacity for each disk   External Interface Network Interface:  1 RJ45 10M/100M adaptive Ethernet Interface USB Interface:  2 USB 2.0 Interfaces Serial Interface:  1 RS-485 interface Alarm Input:  4-ch Alarm Output:  1-ch   General Power Supply:  12V DC Consumption:  ≤ 15W Working Temperature:  -10 °C ~ +55 °C (14 °F ~ 131 °F) Working Humidity:  10% ~ 90% Chassis:  1U chassis Dimensions:  315 × 242 × 45mm (12.4 × 9.5 × 1.8 inch) Weight:  ≤ 1.5Kg (3.3lb)