Features: Support 4xHDMI2.1 signal inputs (DVD-player, Blu-ray-player, networking player, set-top box, PS-4, PS-5, PC, etc.) 2x HDMI2.1 signal outputs (TV, display, projector, etc.). It can easily switching five high-definition signal sources to two high-definition displays or projectors. Optical fiber signals and one stereo- can be synchronously separated and connected to the auditory to obtain high-quality auditory signals. Support /Dolby-Atoms/Dolby-AC3/LPCM Etc Support 4-way HDMI2.1 8K input port； Support 2-way HDMI2.1-8K output port Support 1 channel optical fiber digital auditory output port；Support 1 channel RCA-stereo auditory output port<br/ Specifications: Model: HD378 Adapter:UK/ EU/ AU/ US (Optional） Input ports:HDMI2.1x4 Output ports:HDMI2.1x2 Video format:480P/720P/1080P-/2160P@24/25/30/50/60/100/120Hz,Up to 4320P@50/60Hz, Support HDR-/Dolby-Vision Deep color:8/10/12/16Bit@2160P/8/10bit@4320P Audio format:for Dolby-HD/DTS-HD-/Dolby-Atoms/Dolby-AC3/DTS-/LPCM Etc. Transmission bandwidth:1200MHz Max-. Power adapterInput: AC100~240V Output:DC 12V/1.5A Support 4K120Hz, 8K/60fps resolution input； Support 4k 30fps 3D Support HDCP2.3； HDR10 support； Support CEC Support AC3-, DTS-, -Dolby, PCM and other digital audio formats Audio output supports 3 modes (2CH/5.1/PASS) Package Includes: 1PC x HD378 Audio Converter 1PC x 12V1A Adapter (optional) 1PC x USB Power Cable 1PC x Optical Audio Cable 1PC x 3.5 Lotus- Audio Cable 1PC x Remote Controller note: Simple Downscaler： 1. Please connect the 8K TV to the OUT-B interface first-. OUT-A can output 8K@60Hz or 4K120Hz resolution only in distribution mode- (OUT A and OUT B select the same input source in distribution mode-).Under other modes OUT-A output resolution is 8K@30Hz or 4K60Hz. 2. If the HDMI-compatible- source is 8K@60Hz , OUT-B can output 8K@60Hz , OUT-A can output 4K60Hz Or downscale to 1080P-60Hz. 3. If the HDMI-compatible- source is 4K120Hz , OUT-B can output 4K120Hz , OUT-A can output 4K120Hz Or downscale to 1080P-120Hz.