4x4 Video Splicer 4K HD Multimedia Interface Video Wall Controller 16 Ways Multi Screen Splicing TV Processor Specifications: Size: 43X10X2cm / 17X4X1.5in Weight: 1.05Kg / 2.3lb Operating Special Note (very important) : 1. HD Multimedia Interface cable must use 19 + 1 full needle of wire. 2.The use of image flipping (each image can be flipped independently) : Step 1, press the remote control“Mirror” button, wait for the OSD in the upper left corner of the image to display“Mirror”; Step 2, use the number button to operate, for example, you want to flip the sixth screen, you press the number“6” button. When you're done, remember to press the“Mirror” button again to exit the operating. 3.Switch the output port screen: first, press the remote control“Location” button, wait for the OSD in the upper left corner of the screen to show“Location”; second, use the digital keys to operate, for example, you want to select the 6th screen output, you press the number“6” button. When you're done, remember to press the“Location” button again to exit the operating.