Holiday Shipping Details & Extended Holiday Returns 
1)The 4K refers to the HDMI inputs signal only.It supports up to 4K 30Hz in and 1080P 60Hz out.
2)Pls use qualified HDMI cable with all 19 pines wired and shielded to pair the source and display.
Most sync issues are caused by poor cables.
3)For a pleasant video experience, pls use Professional Video Walls.
4)It supports PCM 2CH stereo audio only either from Aux or the Digital toslink port.And under some cases, when the input is 4K 30Hz, there might be no audio. Pls set the resolutions to 1080P.
The 4K 3X3 video wall controller, support 1-wayHDMl or DVI input and 9 HDMl output,function is to divide a complete HDMl, DVI HDimage singal into 9 blocks and assign to 9 videodisplay unit (such as rear projection unit, LCD TVetc.). Complete with 9 HDMI high-definition videodisplay units to form a large dynamic image screen.
* Supports one DVl input or HDMI input.
* Input support HDMI1.4, HDCP1.4.
* Input format: RGB/YUV24bit;
* Output format: RGB4:4:4 24bit.
* Support 3X3 stitching, easy operation, plug and play;
* Input support 1920x1080P 25/30/50/60Hz 3840x2160P 24/30Hz
* Output support 1920x1080P 60Hz
* Support for 9 HDMl outputs
* Supports SPDIF audio output over optical fibers.
* Supports RS232
* Supports remote control
* DC12V / 2A power supply
1 x TV Video wall controller
1 x DC Power adapter
1 x Remote control(without battery)
1 x User manual
