• Product Model
• Product ModelDS-6904UDI(C)

• Interface
• USB Interface2 × USB 2.0 port
• Serial Interface1 × RS-232 serial port (RJ-45) + 1 × RS-485 serial port
• Network Interface1 × 10/100/1000 Mbps self-adaptive Ethernet interface (RJ-45) 1 × 100 BASE-FX/1000 BASE-X port Supports the self-adaption between the optical port and electrical port.
• Alarm In Interface No.8 channels of alarm input
• Alarm Out Interface No.8 channels of alarm output

• Power
• Power Interface100 VAC to 240 VAC, 50/60 Hz
• Device Consumption< 50 W

• Video Wall
• Video Walls1
• Video Wall Scale≤ 4
• Split WindowSupported
• Window Division per Output Port1, 2, 4, 6, 8, 9, 12, 16, 25, 36
• Layers Per Screen4 × 1080p or 2 × 4K
• Layers per DeviceLayers Per Screen × Output Interface(s)
• Scenes64
• Plans100 view groups on the HCP client

• General
• Working Temperature-10 °C to 55 °C (14 °F to 131 °F)
• Working Humidity0% RH to 90% RH
• Net Weight≤ 5.2 kg (11.46 lb)
• Gross Weight≤ 6.3 kg (13.89 lb)
• Dimensions (W × H × D)440 mm × 44.5 mm × 320.8 mm (17.32 inch × 1.75 inch × 12.63 inch)
• Packing List1 × decoder, 1 × regulatory compliance and safety information manual, 1 × mounting bracket, 1 × power cord, 4 × pads, 1 × grounding cable

• Audio Input
• Audio Input Interfaces2
• Audio Input Interface TypeEmbedded HDMI

• Video Input
• Video Input Interface TypeHDMI 1.4
• Video Input Interfaces2
• Max. Video Input Resolution4K (only in odd-numbered port)
• Video Input Resolution3840 × 2160@30 Hz, 1920 × 1200@60 Hz, 1920 × 1080@60 Hz, 1920 × 1080@50 Hz, 1280 × 720@60 Hz, 1280 × 720@50 Hz, 1600 × 1200@60 Hz, 1280 × 960@60 Hz, 1680 × 1050@60 Hz, 1440 × 900@60 Hz, 1366 × 768@60 Hz, 1280 × 1024@60 Hz, 1024 × 768@60 Hz Supports custom resolution. For 60 Hz input, width ranges from 800 to 1920, and height ranges from 600 to 1200. For 30 Hz input, width ranges from 800 to 3840, and height ranges from 600 to 2160. Width: 4 alignment, height: 2 alignment.

• Video Encoding
• Video Encoding FormatH.264 (default), H.265
• Video Encoding Channels2
• Video Encoding Capability1 channel of 4K@30 Hz or 2 channels of 1080p@60 Hz

• Video Output
• Video Output Interface TypeHDMI 1.4
• Video Output Interfaces4
• Max. Video Output Resolution4K
• Video Output Resolution3840 × 2160@30 Hz, 2560 × 1440@30 Hz, 1920 × 1200@60 Hz, 1920 × 1080@60 Hz, 1920 × 1080@50 Hz, 1680 × 1050@60 Hz, 1600 × 1200@60 Hz, 1280 × 1024@60 Hz, 1280 × 720@60 Hz, 1280 × 720@50 Hz, 1024 × 768@60 Hz
• Loading Capacity for Video Output to LEDSingle port load: 2600000, Width: 144 - 4096, Height: 144 - 2160, Width must be a multiple of 2 and height must be a multiple of 2
• Video Output Interface (BNC)1 channels of CVBS output (BNC port)
• Video Output Resolution (BNC)PAL: 704 × 576@25 Hz NTSC: 704 × 480@30 Hz

• Video Decoding
• Video Decoding FormatH.264, H.265, Smart264, Smart265, MJPEG
• Video Decoding Channels64
• Video Decoding Capability1) H.264/H.265 format: Supports decoding 2-channel 32 MP/24 MP, 4-channel 12 MP, 8-channel 8 MP, 10-channel 6 MP, 16-channel 4 MP, 32-channel 1080p, 64-channel 720p and lower resolution in real time. Four output ports (HDMI output ports 1 to 4) form a group and the group share the decoding capabilities. The group supports up to 4-channel smart decoding or 4-channel encrypted stream decoding. The smart decoding allows the device to decode the smart alarm events from the network cameras. 2) MJPEG format: 4-channel of 1080p and lower resolution 3) HIK264 format: 2-channel of 720p and lower resolution
• Video Decoding ResolutionUp to 32 MP

• Audio Output
• Audio Output Interface TypeEmbedded HDMI audio output port or independent DB15-to-BNC audio output port
• Audio Output Interfaces4

• Audio Decoding
• Audio Decoding FormatG711A, G711U, G722.1, G726-16/U/A, MPEG, AAC-LC, PCM