Item Type: HD Multimedia Interface 4x1 Quad Multi Viewer Material: Metal Input Interface: 4 x HD Multimedia Interface Output Interface: 1x HD Multimedia Interface, 1 x Coaxial, 1 x RS232 Input HD Multimedia Interface Resolution: 1080P 1080i 720P 576P 576i 480P 480i HD Multimedia Interface Maximum Transmission Bandwidth: 225MHz HD Multimedia Interface Maximum Transmission Rate: 6.75gGbps Input and Output TMDS Signal: 0.5-1.5vp-p (TTL) Input and Output DDC Signal: 5vp-p (TTL) Power Adapter Specifications: AC 100-240V DC 12-1.5A Remote Control Battery: CR2025 Button Battery (Not Included) Package List 1 x HD Multimedia Interface 4x1 Quad Multi Viewer 1 x Remote Control 1 x Driver CD 1 x Power Adapter 1 x Manual 1HD Multimedia Interface 4X1 Quad Channel Multiviewer: This 4 in 1 output HD multimedia interface multiviewer allows to display up to 4 HD multimedia interface input sources on 1 output screen. 25 View Modes: This switch provides multiple ways to view source devices, it can display 1, 2 or 4 input source devices at the same time. 3Multi Function: SPDIF coaxial sound output format supports for Dolby digital (AC3), DTS supports 5.1 channel. Support infrared RC, can also be directly controlled by buttons. 4High Resolution: The HD multimedia interface resolution supports up to 1080P 60Hz, and the HD multimedia interface output resolution supports 720P 1080P. 5Easy to Operate: HD multimedia interface multiviewer switch is controlled by RS232 communication, the machine can be upgraded with software, and the equipment can be controlled by computer.equipment can be controlled by computer.