4x4 Matrix Mixer Amplifier is your good choice.In the matrix project, we will often use the requirement of 4 inputs and 4 outputs HDMI matrix mixed signals with multiple inputs and multiple outputs at the same time. Through the input of different types of signals and the requirements of outputting the same or different types of signals to the display device, we will use To the mixing matrix, by selecting one or more channels of the same or different signals to output to one or more channels of large-screen splicing display devices, the signal switching and distribution functions are performed. Today, I would like to briefly introduce to you this product with 4 inputs and 4 outputs hdmi matrix signals, 4 inputs and 4 outputs at the same time. By connecting 4 channels of high-definition HDMI signals to 4 channels of high-definition display devices, like our common monitors, TVs, projectors, and large Display devices such as screens, splicing screens, etc. can be used; through 4 inputs and 4 outputs HDMI matrix signals with multiple inputs and multiple outputs at the same time, each channel of HDMI high-definition signal can select the same picture or different pictures for output display, such as 4 signals, 4 A display device, which can make 4 display devices display 4 same screens or 4 display devices can display 4 different screens; this is the basic function of 4 input and 4 output HDMI matrix signal with multiple input and multiple output at the same time . 4x4 Matrix Mixer Amplifier is your good choice.