4K 3x3 Video Wall Processor: Combine up to 9 HDMI displays into one seamless video wall. Supports 4K@30Hz input and 1080P outputs. 13 Display Modes Video Wall Controller: Toggle between 13 different display modes based on your setup, including 3x3, 2x2, 1x1 (Splitter mode), 2x4, 2x3, 4x2, 3x2, 1x2, 2x1, 1x3, 3x1, 1x4, 4x1 Audio Extraction Function: Route the audio from your source device to an external sound system via SPDIF Optical (5ch) and 3.5mm (2ch) audio output ports. Image Rotation and Edge Masking Function: Rotate each screen up to 180° (Modes 112) for perfect alignment and minimal bezel gaps. Fine-tune the display with edge masking, adjusting up to 8 pixels to eliminate distortion and ensure a seamless video wall. Note: 1×1 splitter mode does not support rotation or edge masking.