16ch D1 real-time DVR ? Video (H.264) / Audio (ADPCM) ? Up to 480 (NTSC) / 400 (PAL)ips recording rate ? Up to 16ch audio inputs and 1ch audio outputs ? Combined BNC and VGA/HDMI video output for main display ? SRD-1670 : Max 6 internal HDD (HDD x 6) SRD-1670D : Max 5 internal HDD (HDD x 5) ? HDD & DVD SATA interface ? DDNS ? Built-in web viewer ? DVD-RW (SRD-1670D) ? Event notifications by E-mail Specifications Value Model SRD-1670DC-2TB Input Voltage 100 to 240 VAC ±10%; 50/60 Hz, Auto ranging Power Consumption Max. 55 W (with 1x HDD), Max. 65W (with 2x HDD) Video Inputs 16 composite video 0.5-1 Vpp, 75 ohm automatic termination Video Resolution 704x480 NTSC Operating System Linux Storage Internal HDD: Max 5 internal HDD (HDD x 5), External HDD: Up to 2 expansion bay (up to 4 HDD each) Audio Inputs 16 line in (Built in 4CH, Option : Audio Extension Cable) Audio Output 1 line PTZ control interface RS-485 USB USB 2.0, 3 ports Operating Temperature +32°F to +104°F (+0°C to +40°C) Transmission speed Up to (15)Mbps, Unlimited(4M)/2/1.5/1 Mbps/800/600/500/400/300/200/100/50 kbps Humidity 20%RH to 85%RH Recording Compression : H.264, Record Rate/NTSC: Up to 480FPS @ 704x480 Live Frame rate:480FPS NTSC, Resolution: 704x480 NTSC Language English, Spanish, French, German, Italian, Polish,Portuguese, Russian, Turkish, Japanese, Czech,Swedish,Danish, Korean, Chinese, Netherlands Dimensions (W x H x D) 17.3 x 3.5 x 16.9 in (440 x 88 x 430 mm) Weight Approx. 16.1 lb (7.5 kg)